Get Free 2020 GMC SIERRA V8, 6.2L TSBs

Released 9/21/2020
Radio Software Version U150 Update

Released 9/18/2020
Hard Tri-Fold Tonneau Water Leaks at the Front Corners of the Pickup Box

Released 9/9/2020
Summit White Paint on Front Impact Bar Appears Off-Color, Slightly Yellow

Released 9/4/2020
Rear Heated Switch Indicators Inoperative

Released 9/4/2020
Vertical Misalignment Between Cab and Pickup Box on Driver Side of Vehicle

Released 8/28/2020
Customer Satisfaction Program - Tonneau Cover Retention

Released 8/10/2020
Engineering Information - Noise Coming From the Window Regulator Area

Released 8/3/2020
Procedure For Attaching GDS2 Session Logs To Technical Assistance Cases Using Dealer Case Management (DCM) (US Dealers Only).

Released 7/23/2020
LIN Bus Diagnostic Information

Released 7/10/2020
Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program Information

Released 7/10/2020
Warranty Administration - Transportation Claim Submission Requirements

Released 7/8/2020
Tri-Fold Tonneau Paint Finish Fading or Discolored

Released 7/8/2020
Engineering Information – Malfunction Indicator Lamp (MIL) Illuminated and/or Functional Failures of the Airflow Shutter, DTCs P05AE, U0284, P059F, U0285 Set

Released 6/24/2020
Warranty Administration - Dealer Empowerment for Goodwill, Customer Enthusiasm and Policy (U.S. Only)

Released 6/24/2020
Customer Satisfaction Program - Tonneau Cover Retention

Released 6/22/2020
Engineering Information - No Restart After Auto-Stop Event, No Crank, DTCs P0617, P26E6 P305D, U0102, U0284, U0285, U0672, U111A, U111E and/or U1348

Released 6/16/2020
Disabling Side Blind Zone Alert and/or Park Assist Systems When Removing Pickup Box and/or Bumper

Released 6/4/2020
Pickup Box Endgate Will Not Fully Close by Itself

Released 6/4/2020
Door May Not Unlock On First Attempt Or Lock Rod Moves Slow/Binds

Released 5/27/2020
Interior Cleaning - Instrument Panel (IP), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer - Product Availability

Released 5/27/2020
Questions Regarding Dealer Installed Associated Accessories

Released 5/20/2020
IPC Odometer Programming Method Quick Reference Guide

Released 5/7/2020
New Vehicle Pre-Delivery Inspection (PDI) - Delivering Quality Vehicles and Generating Higher CSi Scores

Released 5/6/2020
Interior Cleaning - Instrument Panel (IP), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer - Product Availability

Released 5/4/2020
Engineering Information – Malfunction Indicator Lamp (MIL) Illuminated and/or Functional Failures of the Airflow Shutter, DTCs P05AE, U0284, P059F, U0285 Set

Released 4/20/2020
Rattle Noise from Driver or Passenger Seat Belt

Released 4/14/2020
Underbody Component Corrosion

Released 4/3/2020
Interior Cleaning - Instrument Panel (IP), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer - Product Availability

Released 3/20/2020
Interior Cleaning - Instrument Panel (IP), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer - Product Availability

Released 3/18/2020
Warranty Administration - Courtesy Transportation and Roadside Assistance Programs

Released 3/18/2020
Pickup Box Power Endgate May Not Open on Initial Press, or May Not Open at All

Released 2/28/2020
Endgate Will Not Auto Open or Auto Close After Accessory Tonneau Cover Installation, and/or Poor Fit of Tonneau Cover to Endgate

Released 2/27/2020
Warranty Administration – Required Operating Procedures - 8 Points (U.S. Only)

Released 1/31/2020
Safety Recall - Tonneau Cover Retention

Released 1/21/2020
Warranty Administration - Repurchase Vehicle Dealer Processing Fee Labor Operation and Submission Guidelines (U.S. ONLY)

Released 1/9/2020
Safety Recall - Tonneau Cover Retention

Released 1/9/2020
Safety Recall - Seatbelt Pretensioner Fire

Released 1/8/2020
Customer Satisfaction Program - Front Cooling Ventilation Seats Inoperative

Released 1/6/2020
Intermittent or Continuous Horn Blowing, Horn Activation Sensitive to the Touch

Released 12/12/2019
Service Programming System (SPS) Errors (E4398, E4399, E4403, M4404, M4413, M6954, M6955, E4414, E4423, E4491 or E6961)

Released 12/11/2019
Safety Recall - Tonneau Cover Retention

Released 11/25/2019
Use of Dealer Case Management (DCM) and Technician Preparedness for Contacting U.S. Technical Assistance (TAC)

Released 11/22/2019
Safety Recall - Seatbelt Pretensioner Fire

Released 11/20/2019
Pickup Box Out of Alignment

Released 11/19/2019
Engineering Information – Pictures of Loose Ground Connections at G110 and/or G114

Released 10/30/2019
Spray-in Bed Liner General Information and Repair Procedures

Released 10/16/2019
Information for Dealers on How to Submit a Product Information Report (PIR) (Canada Only)

Released 10/11/2019
Engineering Information – Power Outside Folding Rearview Mirror Shakes, Clicking and/or Noisy While Folding or Loose Between Mirror Head and Mirror Base

Released 9/6/2019
Procedure For Attaching GDS2 Session Logs To Technical Assistance Cases Using Dealer Case Management (US Dealers Only).

Released 9/5/2019
Creak/Pop Noise From Front Over Bumps

Released 8/19/2019
GM Wiring Repair Strategy Information

Released 8/15/2019
Engineering Information – Power Outside Folding Rearview Mirror Shakes, Clicking and/or Noisy While Folding or Loose Between Mirror Head and Mirror Base

Released 9/22/2020
Loss of Brake Assist, Various Messages Displayed in Driver Information Center (DIC), Brake Pedal Travel and Apply May Feel Different, One or More of the Following DTCs May be Set: P0606 with C0021, C05D2, C0595, C2A3B, C0024, C053D, P25A2

Released 9/10/2020
Service Engine Soon Message at Start Up or Shortly after Start Up

Released 6/26/2020
Brake Pedal Moves or Self Applies at Full Turns

Released 6/16/2020
DTC C116C and/or C116B After Installation of GM Accessory Performance Brake Pads

Released 5/27/2020
SES MIL With BSCM DTCs U0146 U0100 U0101 U0140 U0151 U026A U0131 and/or U0422

Released 5/21/2020
GM Accessory Performance Brake System Rotor Specifications (Brembo Brake Kit)

Released 4/21/2020
Safety Recall - Brake Caliper Bolt Strength

Released 4/21/2020
Customer Satisfaction Program - Brake System Control Module Interaction with the MyBrand App Remote Start Feature

Released 4/16/2020
SES MIL With BSCM DTCs U0146 U0100 U0140 U0151 U026A U0131 and/or U0422

Released 3/30/2020
Adding Integrated Trailer Brake Controller RPO JL1

Released 3/20/2020
Diagnostic Tip - Check and/or Service Trailer Brake System message DTC C1114

Released 2/27/2020
Safety Recall - Brake Caliper Bolt Strength

Released 2/26/2020
Service Brake System, Reduced Engine Power, Speed Limited messages On The DIC And SES MIL On With DTCs C0021 and P0606 Setting

Released 1/6/2020
Service Brake System, Reduced Engine Power, Speed Limited messages on the DIC and SES MIL on with DTCs C0021 and P0606 setting

Released 12/9/2019
Diagnostic Tip - Perceived Brake Fluid Leak at Caliper Piston Boot

Released 7/29/2020
MIL illuminated with DTC P026A

Released 6/22/2020
Engineering Information - No Restart After Auto-Stop Event, No Crank, DTCs P0617, P26E6 P305D, U0102, U0284, U0285, U0672, U111A, U111E and/or U1348

Released 5/20/2020
MIL illuminated with DTC P1098 and/or P26BB

Released 4/7/2020
MIL illuminated with DTC P1098 and/or P26BB

Released 4/6/2020
Diagnostic Tip: Possible DTC P3075 That May Be Set Current or History

Released 3/16/2020
MIL illuminated with DTC P1098 and/or P26BB

Released 1/17/2020
MIL illuminated with DTC P1098 and/or P26BB

Released 1/17/2020
Diagnostic Tip: Possible DTC P3075 That May Be Set Current or History

Released 12/5/2019
MIL On and/or Cooling Fans Running Continuous For An Extended Period Of Time

Released 12/2/2019
3.0L (LM2) Diesel Engine Coolant Flow Control Valve Part Restriction Has Ended

Released 10/29/2019
3.0L (LM2) Diesel Engine Coolant Flow Control Valve Part Restriction

Released 9/11/2019
MIL illuminated with DTC P1098 and/or P26BB

Released 8/21/2019
3.0L (LM2) Diesel Engine Coolant Flow Control Valve Part Restriction

Released 10/9/2020
Warranty Administration - Customer Concern Not Duplicated (CCND) Labor Operation Numbers

Released 9/23/2020
Engineering Information - Slow Start and/or No Start, Battery Message Indicated, Having to Jump Start On More Than One Occasion

Released 9/4/2020
Rear Heated Switch Indicators Inoperative

Released 9/3/2020
SES MIL / No Start / No Crank / Runs Rough / Reduced Engine Power / VSS / DTCs (Inspect Engine Harness)

Released 9/3/2020
Diagnostic Tip: DTC P06DD P06DA P06DB Set Current Or History Due To Potential Engine Wiring Harness Issues

Released 8/20/2020
SES MIL / Reduced Engine Power / Misfire / IPC Gauges Sweep / IPC Warning Message / Loss Communication / Various DTCs / Blown Fuse (Inspect Engine Harness 3.0L Diesel)

Released 8/17/2020
Squeak/Creak/Squawk/Itch Type Noise Heard From The I/P or Center Console Area

Released 8/12/2020
Engineering Information – Check Trailer Message on Drivers Information Center (DIC) and/or F74, F82 Fuses Blown

Released 8/10/2020
Engineering Information - Noise Coming From the Window Regulator Area

Released 8/6/2020
Engineering Information - Slow Start and/or No Start, Battery Message Indicated, Having to Jump Start On More Than One Occasion

Released 8/4/2020
Engineering Information - Vehicle Exhibits a No Crank No Start Condition During Start/Stop Event or When Starting Vehicle Using the Start Button On the Dash

Released 7/29/2020
SES MIL / No Start / No Crank / Runs Rough / Reduced Engine Power / Loss Communication / DTCs (V8 and V6 Inspect Engine Harness)

Released 7/24/2020
Diagnostic Tip - Security Light on Intermittently / No Crank/No Start or Start Stall / Keyless Access Vehicles May Display No Remote/Fob Detected / Poor or No RKE Range / Service TPM

Released 7/15/2020
Information on Available BCM Calibrations to Restore Bulb Outage Detection on Vehicles Produced by a Second Stage Manufacturer (Upfitter), Turn Signals Flash Fast after Factory Box Removed

Released 7/8/2020
Engineering Information - SD Card Error Code and Message Displayed on Radio Screen and/or Instrument Cluster - Navigation System Malfunction

Released 6/30/2020
SES MIL DTC P0201/P0202/P0203/P0204/P0205/P0206/P0216 (Inspect Engine Harness 3.0L Diesel)

Released 6/26/2020
Procedure For Emailing Global Diagnostic System 2 (GDS2) Session Log To GM TAC (US and Canada Dealers Only)

Released 6/26/2020
Various Electrical Concerns (Inspect UBEC Bolts For Being Loose)

Released 6/25/2020
Warranty Administration - Battery Testing and Warranty Replacement Requirements (North America ONLY)

Released 6/12/2020
SES MIL DTC P0201/P0202/P0203/P0204/P0205/P0206/P0216 (Inspect Engine Harness 3.0L Diesel)

Released 6/11/2020
Possible Crank No Start or Extended Crank With DTC P12A6 Set As Current or History

Released 6/10/2020
Engineering Information - Shift to Park Message On the Drivers Information Center (DIC) (ONLY On Push Button Ignition), Unable to Remove Key from Ignition Cylinder and/or Difficult to Shift Out of Park

Released 6/10/2020
Diagnostic Tip - Intermittent Parasitic Battery Draw / Dead Battery / Slow Crank / Radio Stays On or Fades Slowly After RAP Cancel / (LIN Bus)

Released 6/5/2020
Diagnostic Tip - Trailer Lighting Complaints With Trailering App RPO U1D

Released 6/4/2020
Door May Not Unlock On First Attempt Or Lock Rod Moves Slow/Binds

Released 6/2/2020
Diagnostic Tips - Intermittent Parasitic Battery Draw Below 40 Degrees F / Dead Battery / Slow Crank

Released 5/27/2020
Service Update - Engine Wiring Harness Chafe

Released 5/26/2020
SES MIL / No Start / No Crank / Runs Rough / Reduced Engine Power / Loss Communication / DTCs (V8 and V6 Inspect Engine Harness)

Released 5/21/2020
Misfire Template

Released 5/20/2020
IPC Odometer Programming Method Quick Reference Guide

Released 5/18/2020
Engineering Information - Shift to Park Message On the Drivers Information Center (DIC) (ONLY On Push Button Ignition), Unable to Remove Key from Ignition Cylinder and/or Difficult to Shift Out of Park

Released 5/7/2020
SES MIL / IPC Gauges Sweep / IPC Warning Message / Reduced Engine Power / Loss Communication / Various DTCs (V6 Inspect Engine Harness)

Released 4/30/2020
Diagnostic Tips - SES MIL DTC B2B0D and/or B2B0E

Released 4/28/2020
Speaker Grill Rusting on GM Accessory Multipro Tailgate Audio System By Kicker

Released 4/27/2020
Speedometer Needle Accuracy Information

Released 4/21/2020
SES Lamp With Camshaft or Oil Pump System Related DTCs

Released 4/9/2020
Warranty Administration - Battery Testing and Warranty Replacement Requirements (North America ONLY)

Released 3/25/2020
Engineering Information – Check Trailer Message on Drivers Information Center (DIC) and/or F74, F82 Fuses Blown

Released 3/20/2020
Diagnostic Tip - Check and/or Service Trailer Brake System message DTC C1114

Released 3/18/2020
Pickup Box Power Endgate May Not Open on Initial Press, or May Not Open at All

Released 3/17/2020
8L45 8L90 Internal Wiring Harness Part Numbers By Application

Released 2/20/2020
Safety Recall - Loose Alternator Cable

Released 1/23/2020
TAC Part Restriction for US Dealers - Navigation Radio, Radio, Radio Display, Radio Control/Integrated Center Stack, Instrument Cluster, and Head-Up Display

Released 1/17/2020
Snow Plow Generator Harness Installation / Radio HVAC IPC Blank out When Operating a Snow Plow

Released 1/8/2020
Customer Satisfaction Program - Front Cooling Ventilation Seats Inoperative

Released 1/6/2020
Intermittent or Continuous Horn Blowing, Horn Activation Sensitive to the Touch

Released 1/3/2020
Engineering Information – No Crank / No Start

Released 12/13/2019
Safety Recall - Loose Alternator

Released 12/12/2019
Engineering Information - During Start/Stop Event Vehicle Fails to Restart Using the Start Button On the Dash

Released 12/2/2019
3.0L LM2 Diesel Engine with Malfunction Indicator Lamp Illuminated With one or more DTCs set. P2B60, P1010

Released 11/27/2019
Service Update Bulletin - Fog Lamps Inoperative

Released 11/26/2019
Key Code Security Rules and Information on GM KeyCode Look-Up Application (U.S. Only)

Released 11/19/2019
Engineering Information – Pictures of Loose Ground Connections at G110 and/or G114

Released 11/7/2019
Engineering Information – Service Engine Soon (SES) Lamp Illuminated, DTC P1467 Set

Released 11/5/2019
J-35616-64B Or EL-35616-58 Terminal Test Probe Information/Repair

Released 10/17/2019
Check Engine Lamp With DTC P3055 or P3056

Released 10/16/2019
SES MIL / IPC Gauges Sweep / IPC Warning Message / Reduced Engine Power / Loss Communication / DTCs U0073 U0100 U0101 u0121 U0128 U0129 U0131 U0140 U0146 U0422 U2413 P0107 P0641 C2A07 (Inspect Engine Harness)

Released 10/7/2019
Malfunction Indicator Lamp (MIL) Illuminated, Shift to Park Message on Drivers Information Center (DIC), Unable to Turn Off Ignition and/or Discharged Battery - Multiple DTCs Set

Released 9/25/2019
Do Not Swap Modules in Vehicles with Global Electrical Systems

Released 8/19/2019
GM Wiring Repair Strategy Information

Released 11/1/2019
Service Update - Positive Crankcase Ventilation Hose Loose

Released 8/20/2020
SES MIL / Reduced Engine Power / Misfire / IPC Gauges Sweep / IPC Warning Message / Loss Communication / Various DTCs / Blown Fuse (Inspect Engine Harness 3.0L Diesel)

Released 8/20/2020
Low Mileage Running Poorly With Rich Fuel Trims and/or Crank Case Overfull

Released 8/12/2020
2020 3.0L (LM2) Diesel Engine Air Delivery and Exhaust Part Restriction

Released 5/27/2020
Various Engine Noises During Cold Start and Warm Engine Operation

Released 5/21/2020
Misfire Template

Released 5/8/2020
EPA Summer Grade Gasoline Waiver Allows Use of Winter Grade Surplus Potential Drivability Concerns P0300 P0171 P0174 P228C Fuel Smell Odor Longer Extended Cranking Time Hesitation Engine Stalls

Released 5/5/2020
Information on Fuel Injector Replacement Guidelines During Service, Malfunction Indicator Lamp (MIL) Illuminated - DTCs P0300-P0308, P050D, P0171, P0172, P0174, P0175, P2099, P219A, and/or P219B Set

Released 4/27/2020
Possible Crank No Start or Extended Crank With DTC P12A6 Set As Current or History

Released 4/24/2020
Low Mileage Running Poorly With Rich Fuel Trims and/or Crank Case Overfull

Released 4/20/2020
2020 3.0L (LM2) Diesel Engine Air Delivery and Exhaust Part Restriction

Released 4/17/2020
Possible Crank No Start or Extended Crank With DTC P12A6 Set As Current or History

Released 4/7/2020
Information on Excessive Diesel Exhaust Fluid (DEF) Usage

Released 3/27/2020
Fuel Injector Flow Rate Identifier Labels

Released 3/4/2020
SES MIL DTC P1005

Released 2/21/2020
2020 3.0L (LM2) Diesel Engine Air Delivery and Exhaust Part Restriction

Released 1/17/2020
SES MIL DTC P1005

Released 1/14/2020
Diagnostic Tip: Poor Engine Performance Or CEL On In Cold Ambient Temperatures On Vehicles Equipped With Turbocharged Gasoline Engines May Set One Or More Of The Following DTCs P0299 P2227

Released 1/10/2020
Engine Runs With Intermittent Crank No Start With P0011 Or P00C6 May be Current Or Set In History

Released 12/20/2019
SES Light with DTCs P24B0 and/or P0461 Fuel Gauge May Read Empty.

Released 12/10/2019
Safety Recall - High Pressure Fuel Pump Leak

Released 12/9/2019
Service Engine Soon (SES) Lamp Illuminated, DTC P1467 and/or P1469 Set

Released 12/4/2019
Safety Recall - High Pressure Fuel Pump Leak

Released 11/26/2019
Air Filter Monitor Reset For Full Size HD Pick-Ups with 6.6L Diesel

Released 11/20/2019
2020 3.0L (LM2) Diesel Engine Air Delivery and Exhaust Part Restriction

Released 11/1/2019
Service Update - Positive Crankcase Ventilation Hose Loose

Released 10/29/2019
3.0L (LM2) Diesel Turbocharger and EGR part restriction

Released 10/29/2019
2020 3.0L (LM2) Diesel Engine Air Delivery and Exhaust Part Restriction

Released 10/28/2019
Engine Air Leak from The Foul PCV Tube, Whistle Noise, P0171 and/or P0174

Released 10/25/2019
Normal Characteristic - Bump Feel Or Clunk Noise After A Stop

Released 10/22/2019
GE-52250 Power Smoke Diagnostic Leak Detector Turbocharger Charge Air And Induction System Tester MIL Reduced Engine Power

Released 8/27/2019
Information on Normal Characteristics After Engine is Shut Off

Released 8/23/2019
LM2 Diesel fuel injector and injection pump part restriction

Released 10/8/2020
Manual HVAC Settings During a Remote Start - Diagnostic Tip

Released 8/21/2020
Poor A/C Performance and/or Drivers Side A/C Blows Warmer Than Passenger Side (A/C Condenser Internally Bypassing)

Released 7/27/2020
AC Blows Warm or Poor Performance

Released 3/9/2020
Manual HVAC Settings During a Remote Start - Diagnostic Tip

Released 2/28/2020
Poor Heater Performance - Diagnostic Tip

Released 10/15/2020
Engineering Information - Check Engine Lamp Illuminated On Drivers Information Center (DIC), DTCs U0284, U0285, P059F and/or P05AE Set

Released 10/15/2020
Engineering Information - No Restart After Auto-Stop Event, No Crank, DTCs P0617, P26E6 P305D, U0102, U0284, U0285, U0672, U111A, U111E and/or U1348

Released 10/13/2020
Information on Diesel Exhaust Fluid (DEF) Pump Unable to Build Pressure After Replacement

Released 10/9/2020
Warranty Administration - Customer Concern Not Duplicated (CCND) Labor Operation Numbers

Released 10/8/2020
Misfire Template

Released 10/5/2020
Possible Crank No Start or Extended Crank With DTC P12A6 Set As Current or History

Released 9/23/2020
Engineering Information - Slow Start and/or No Start, Battery Message Indicated, Having to Jump Start On More Than One Occasion

Released 9/22/2020
Service Engine Light misfire engine noise With DTC P0300 P0106 P0506

Released 9/22/2020
Possible Crank No Start or Extended Crank With DTC P12A6 Set As Current or History

Released 9/15/2020
DTC P06DD And/Or Excessive Oil Consumption

Released 9/14/2020
Diagnostic Tip: Inspect Engine Oil Dipstick Tube O-ring And Areas Above Lower Oil Pan Sealing Surface For Potential Engine oil Leaks

Released 9/11/2020
Diagnostic Tips For P0708 Setting On Vehicles Equipped With 8L45 8L90 10L60 10L80 10L90 Transmissions

Released 9/9/2020
Delayed and/or Harsh Engagement of Transmission Shift After Vehicle Sitting with Engine Off

Released 9/8/2020
Information on Malfunction Indicator Lamp (MIL) Illuminated - DTCs P050D and/or P0300 Setting on A Cold Start and/or Engine Runs Rough when Warm with No Codes

Released 9/8/2020
Service Engine Light misfire engine noise With DTC P0300 P0106 P0506

Released 9/3/2020
SES MIL / No Start / No Crank / Runs Rough / Reduced Engine Power / VSS / DTCs (Inspect Engine Harness)

Released 9/3/2020
Diagnostic Tip: DTC P06DD P06DA P06DB Set Current Or History Due To Potential Engine Wiring Harness Issues

Released 9/2/2020
Malfunction Indicator Lamp (MIL) Illuminated - DTC P0128 Set

Released 8/27/2020
Possible Crank No Start or Extended Crank With DTC P12A6 Set As Current or History

Released 8/20/2020
Low Mileage Running Poorly With Rich Fuel Trims and/or Crank Case Overfull

Released 8/17/2020
Squeak/Creak/Squawk/Itch Type Noise Heard From The I/P or Center Console Area

Released 8/12/2020
Squeak Chirp Noise From Front Axle In 2wd

Released 8/12/2020
2020 3.0L (LM2) Diesel Engine Air Delivery and Exhaust Part Restriction

Released 8/6/2020
Possible Crank No Start or Extended Crank With DTC P12A6 Set As Current or History

Released 8/6/2020
Engineering Information - Slow Start and/or No Start, Battery Message Indicated, Having to Jump Start On More Than One Occasion

Released 7/29/2020
Possible Crank No Start or Extended Crank With DTC P12A6 Set As Current or History

Released 7/27/2020
Needle Bearings Found In The Oil Pan During An Oil Change

Released 7/10/2020
Diagnosing Fishbite Chuggle Misfire Feeling Or Shudder Vibration, With A Light Tip In

Released 7/8/2020
Engineering Information – Oil Leaking From Oil Pan

Released 7/8/2020
Engineering Information – Malfunction Indicator Lamp (MIL) Illuminated and/or Functional Failures of the Airflow Shutter, DTCs P05AE, U0284, P059F, U0285 Set

Released 6/30/2020
SES MIL DTC P0201/P0202/P0203/P0204/P0205/P0206/P0216 (Inspect Engine Harness 3.0L Diesel)

Released 6/26/2020
Various Electrical Concerns (Inspect UBEC Bolts For Being Loose)

Released 6/25/2020
Diagnosing Fishbite Chuggle Misfire Feeling Or Shudder Vibration, With A Light Tip In

Released 6/24/2020
Engine Control Module Calibration for T1 L3B Engine with DTC P26BB Set

Released 6/23/2020
Warranty Administration - Engine and Transmission Assembly Replacement (U.S. Only)

Released 6/22/2020
Engineering Information - No Restart After Auto-Stop Event, No Crank, DTCs P0617, P26E6 P305D, U0102, U0284, U0285, U0672, U111A, U111E and/or U1348

Released 6/16/2020
Exhaust Brake Feel

Released 6/13/2020
Diagnostic Tip: Inspect Engine Oil Dipstick Tube O-ring And Areas Above Lower Oil Pan Sealing Surface For Potential Engine oil Leaks

Released 6/12/2020
SES MIL DTC P0201/P0202/P0203/P0204/P0205/P0206/P0216 (Inspect Engine Harness 3.0L Diesel)

Released 6/11/2020
Possible Crank No Start or Extended Crank With DTC P12A6 Set As Current or History

Released 6/10/2020
Engineering Information - Shift to Park Message On the Drivers Information Center (DIC) (ONLY On Push Button Ignition), Unable to Remove Key from Ignition Cylinder and/or Difficult to Shift Out of Park

Released 6/8/2020
Slip Or Shudder During A Launch In First Second Third Or Fourth Gears Delayed Engagement Into Drive Clunk Or Bump During The 1-2 Shift

Released 5/28/2020
Ticking Noise from the Engine

Released 5/27/2020
Service Update - Engine Wiring Harness Chafe

Released 5/27/2020
Various Engine Noises During Cold Start and Warm Engine Operation

Released 5/26/2020
SES MIL / No Start / No Crank / Runs Rough / Reduced Engine Power / Loss Communication / DTCs (V8 and V6 Inspect Engine Harness)

Released 5/26/2020
Engineering Information - Shift to Park Message On the Drivers Information Center (DIC) (ONLY On Push Button Ignition), Unable to Remove Key from Ignition Cylinder and/or Difficult to Shift Out of Park

Released 5/21/2020
Misfire Template

Released 5/21/2020
Service Update Bulletin - Diesel Exhaust Fluid System Inactive

Released 5/20/2020
Squeak Chirp Noise From Front Axle In 2wd

Released 5/20/2020
MIL illuminated with DTC P1098 and/or P26BB

Released 5/15/2020
Service Update - Software Update for Internal Range Sensor Failure

Released 5/13/2020
DTC P0101 Mass Air Flow (MAF) Sensor Performance, P1682 Set after MAF Replacement

Released 5/12/2020
Fuel Pump Driver Control Module Configuration Function Missing in GDS2

Released 5/11/2020
2-3 Upshift Slip or Flare

Released 5/8/2020
Diagnosing Hoot Type Noise On 2020 Chevrolet Silverado And GMC Sierra Vehicles Equipped With 10L80 Transmissions MQB

Released 5/7/2020
Engineering Information – Oil Leaking From Oil Pan

Released 5/6/2020
Diagnosing Fishbite Chuggle Misfire Feeling Or Shudder Vibration, With A Light Tip In

Released 5/5/2020
GE-52250 Power Smoke Diagnostic Leak Detector Turbocharger Charge Air And Induction System Tester MIL Reduced Engine Power

Released 5/5/2020
8L45 8L90 Internal Wiring Harness Part Numbers By Application

Released 4/30/2020
Diagnostic Tips - SES MIL DTC B2B0D and/or B2B0E

Released 4/29/2020
Engineering Information - Reduced Engine Power, DTC P2B93 Set

Released 4/27/2020
Possible Crank No Start or Extended Crank With DTC P12A6 Set As Current or History

Released 4/24/2020
Customer Satisfaction Program - Transmission Pump Idler Gear Noise - 2 Involved Vehicles in the USA Only

Released 4/21/2020
SES Lamp With Camshaft or Oil Pump System Related DTCs

Released 4/17/2020
Possible Crank No Start or Extended Crank With DTC P12A6 Set As Current or History

Released 4/9/2020
Diagnostic Tips For P0708 Setting On Vehicles Equipped With 8L45 8L90 10L60 10L80 10L90 Transmissions

Released 4/7/2020
Low Oil or Add Oil Message Being Displayed on the Driver Information Center (DIC)

Released 4/6/2020
SES Lamp With Camshaft Position Codes P0340 and/or P0341

Released 4/3/2020
SES Lamp P050D P0300 Setting On A Cold Start And/Or a Run Rough Warm with No codes

Released 4/2/2020
Engineering Information – Oil Leaking From Oil Pan

Released 3/30/2020
Diagnostic Tip: Oil Leak Repairs and Resealing of Composite Oil Pans and Use of Proper RTV Sealant and Surface Primer

Released 3/27/2020
Squeak Chirp Noise From Front Axle In 2wd

Released 3/27/2020
Malfunction Indicator Lamp Illuminated with One or More Glow Plug Control DTCs Set

Released 3/26/2020
Engineering Information – Service Engine Soon (SES) Lamp Illuminated, DTCs B2B0D and/or B2B0E Central Gateway Module Codes Unable to Communicate with HSLAN or LSLAN

Released 3/18/2020
Service 4wd message with DTC C15A9

Released 3/17/2020
Shifter Stuck In Park

Released 3/17/2020
8L45 8L90 Internal Wiring Harness Part Numbers By Application

Released 3/17/2020
Service 4wd message with DTC C05FB

Released 3/17/2020
Various Engine Noises During Cold Start and Warm Engine Operation

Released 3/9/2020
Information on Malfunction Indicator Lamp (MIL) Illuminated with Multiple Fuel Trim and/or Oxygen Sensor Codes Set

Released 2/26/2020
Information on Active Fuel Management (AFM) and Dynamic Fuel Management (DFM) Usage

Released 2/4/2020
2020 10L60 10L80 10L90 10 Speed Gen II Automatic Transmission Restriction Program

Released 1/31/2020
3.0L LM2 Diesel Engine With Malfunction Indicator Lamp Illuminated With One Or More DTCs Set - P214E, P2B60, P1010, P226D and/or P24B0

Released 1/28/2020
Service Update - Stop-Start Disabling Function Inoperative

Released 1/28/2020
Engineering Information - During Start/Stop Event Vehicle Fails to Restart Using the Start Button On the Dash

Released 1/24/2020
DFM/AFM Vibration Or Drone

Released 1/17/2020
8L45 8L90 Internal Wiring Harness Part Numbers By Application

Released 1/17/2020
SES MIL DTC P1005

Released 1/17/2020
Diagnosing Fishbite Chuggle Misfire Feeling Or Shudder Vibration, With A Light Tip In

Released 1/17/2020
Engineering Information - 8 Speed Transmission Shift Quality

Released 1/15/2020
3.0L (RPO LM2) Engine Exchange Program

Released 1/13/2020
Engineering Information – 8 Speed Transmission Shift Quality

Released 1/10/2020
Diagnostic Tips for Engine Vibration

Released 1/10/2020
Engine Runs With Intermittent Crank No Start With P0011 Or P00C6 May be Current Or Set In History

Released 1/7/2020
3.0L LM2 Diesel Engine With Malfunction Indicator Lamp Illuminated With One Or More DTCs Set - P2B60, P1010, P226D and/or P24B0

Released 1/6/2020
Service Update - ECM and Reductant Control Modules

Released 12/20/2019
SES Light with DTCs P24B0 and/or P0461 Fuel Gauge May Read Empty.

Released 12/17/2019
MIL On and/or Cooling Fans Running Continuous For An Extended Period Of Time

Released 12/12/2019
3.0L LM2 Diesel Engine With Malfunction Indicator Lamp Illuminated With One Or More DTCs Set - P2B60, P1010, P226D and/or P24B0

Released 12/6/2019
Service Update - Prop Shaft Fracture At Yoke-To-Tube Friction Weld

Released 12/5/2019
MIL On and/or Cooling Fans Running Continuous For An Extended Period Of Time

Released 12/4/2019
Engineering Information – Service Engine Soon (SES) Lamp Illuminated, DTCs B2B0D and/or B2B0E Central Gateway Module Codes Unable to Communicate with HSLAN or LSLAN

Released 12/2/2019
3.0L LM2 Diesel Engine with Malfunction Indicator Lamp Illuminated With one or more DTCs set. P2B60, P1010

Released 12/2/2019
PQC E01 ECM Part Restriction Has Ended

Released 11/25/2019
Engineering Information - Service Engine Soon (SES) Lamp Illuminated, DTC P1467 Set

Released 11/22/2019
GM TAC Support On Vehicle Automatic Transmission Concerns That Can Be Duplicated

Released 11/22/2019
No Restart after an Auto Stop Event / No Crank / DTC U0102 U0284 U0285 U0672 P0617 P26E6 P305D U111A U111E U1348

Released 11/7/2019
Engineering Information – Service Engine Soon (SES) Lamp Illuminated, DTC P1467 Set

Released 11/4/2019
Engine Air Leak from The Foul PCV Tube, Whistle Noise, P0171 and/or P0174

Released 10/29/2019
Information on Driveline Clunk Noise

Released 10/25/2019
Normal Characteristic - Detent or Click Felt as The Accelerator is Pressed

Released 10/23/2019
P0128 Setting

Released 10/17/2019
Diagnostic Tip - Diesel Exhaust Fluid System Contamination

Released 10/16/2019
SES MIL / IPC Gauges Sweep / IPC Warning Message / Reduced Engine Power / Loss Communication / DTCs U0073 U0100 U0101 u0121 U0128 U0129 U0131 U0140 U0146 U0422 U2413 P0107 P0641 C2A07 (Inspect Engine Harness)

Released 10/15/2019
Loose Shifter Lever / Poor Shift Actuation from Shift Lever / Shift to Park Message / Dead Battery

Released 10/14/2019
Clean Exhaust Filter See Owners Manual Now, Cleaning Exhaust Filter Keep Driving Until Message is Cleared or Diesel Partic Filter is Full Continue Driving Displayed on DIC, DTC P2463 May Be Set

Released 10/9/2019
Information on Engine Oil Consumption Guidelines

Released 9/24/2019
Ticking Noise From The Engine

Released 9/23/2019
2020 10L60 10L80 10L90 10 Speed Gen II Automatic Transmission Restriction Program

Released 9/18/2019
Rear Wheels Lock Up While Driving At Low Speeds Feels Like The Brakes Applied Or The Transmission Was Shifted To Park DTCs P2724 P2727 Or P2729 May Or May Not Set

Released 9/13/2019
Engineering Information – Oil Leaking From Oil Pan

Released 9/5/2019
Normal Characteristic - Engine Stops Running after Extended idle

Released 9/5/2019
3.0L (RPO LM2) Engine Exchange Program

Released 9/4/2019
PQC E01 ECM Restriction

Released 8/30/2019
3.0L (RPO LM2) Engine Exchange Program

Released 8/28/2019
Duramax Diesel 3.0L New Engine Features

Released 8/23/2019
LM2 Diesel fuel injector and injection pump part restriction

Released 8/21/2019
Identifying Non-GM (Aftermarket) Engine Calibrations for Gasoline Engines Using Tech 2 or GDS 2 (U.S. and Canada)

Released 8/19/2019
GM Wiring Repair Strategy Information

Released 8/14/2019
3.0L (RPO LM2) Engine Exchange Program

Released 9/11/2020
Safety Recall - Reduced (LH) Roof Rail Air Bag Performance

Released 8/19/2020
Safety Recall - Reduced (RH) Roof Rail Air Bag Performance

Released 8/19/2020
Safety Recall - Reduced (LH) Roof Rail Air Bag Performance

Released 7/31/2020
Safety Recall - Reduced (LH) Roof Rail Air Bag Performance

Released 6/24/2020
Safety Recall - Tonneau Cover Retention

Released 8/14/2020
Warranty Administration - General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only)

Released 7/29/2020
Intermittent Service Steering Column Lock message displayed with U0155 Set

Released 6/26/2020
Brake Pedal Moves or Self Applies at Full Turns

Released 4/29/2020
Warranty Administration - General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only)

Released 4/14/2020
Unwanted Stability Activation and/or C0710

Released 4/6/2020
Various Vehicle Handling Concerns Suspension Noise or Damaged Suspension Components Due to Vehicle Modifications

Released 3/9/2020
Various Vehicle Handling Concerns Suspension Noise or Damaged Suspension Components Due to Vehicle Modifications

Released 3/9/2020
Tire Sidewall Irregularities

Released 2/26/2020
Warranty Administration - General Motors New Vehicle Tire Warranty Program (U.S. Dealers Only)

Released 9/9/2020
Summit White Paint on Front Impact Bar Appears Off-Color, Slightly Yellow

Released 9/2/2020
Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program Information

Released 8/12/2020
Engineering Information – Check Trailer Message on Drivers Information Center (DIC) and/or F74, F82 Fuses Blown

Released 7/13/2020
GE-52250 Power Smoke Diagnostic Leak Detector Turbocharger Charge Air And Induction System Tester MIL Reduced Engine Power

Released 6/24/2020
Engine Control Module Calibration for T1 L3B Engine with DTC P26BB Set

Released 6/18/2020
Phone Contacts Not Loading, Sirius XM Displays XM Loading or Acquiring Signal Message, FM Browse Inoperative, Android Auto May Not Auto Connect Bluetooth, Radio and Display Inop After Remote Start

Released 5/21/2020
Service Update Bulletin - Diesel Exhaust Fluid System Inactive

Released 5/20/2020
MIL illuminated with DTC P1098 and/or P26BB

Released 4/9/2020
Blank Radio Display or No Audio

Released 4/9/2020
Warranty Administration - Battery Testing and Warranty Replacement Requirements (North America ONLY)

Released 3/30/2020
Diagnostic Tip: Oil Leak Repairs and Resealing of Composite Oil Pans and Use of Proper RTV Sealant and Surface Primer

Released 3/25/2020
Engineering Information – Check Trailer Message on Drivers Information Center (DIC) and/or F74, F82 Fuses Blown

Released 3/18/2020
Service 4wd message with DTC C15A9

Released 3/17/2020
Service 4wd message with DTC C05FB

Released 11/26/2019
Key Code Security Rules and Information on GM KeyCode Look-Up Application (U.S. Only)

Released 11/26/2019
Air Filter Monitor Reset For Full Size HD Pick-Ups with 6.6L Diesel

Released 11/5/2019
J-35616-64B Or EL-35616-58 Terminal Test Probe Information/Repair

Released 10/29/2019
3.0L (LM2) Diesel Engine Coolant Flow Control Valve Part Restriction

Released 10/29/2019
2020 3.0L (LM2) Diesel Engine Air Delivery and Exhaust Part Restriction

Released 10/10/2019
Vehicle Vibration Diagnosis and TAC Requests For Assistance With Vibration Related Complaints

Released 10/9/2019
Key Code Security Rules and Information on GM KeyCode Look-Up Application (U.S. Only)

Released 9/17/2019
Global Warranty Management (GWM) Warranty Parts Center (WPC) Parts Return Program Information