Get Free 2020 GMC SIERRA V8, 6.6L TSBs

Released 9/22/2020
SPS Programming Issues / No Communication / IPC Gauges Erratic / Various IPC Warning MILs / Certain Cruise Control Speeds Will Not Set / Communication DTCs

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

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

Released 6/22/2020
360 Camera Views go Blank with Tailgate Removed

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

Released 5/7/2020
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 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
Pickup Box Power Endgate May Not Open on Initial Press, or May Not Open at All

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

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

Released 1/9/2020
Service Update - Incorrect Driver Display Message for Diesel Exhaust Fluid

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

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 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 9/13/2019
Paint Issues Peeling/Flaking/Bubbles/Thin/Chips/Debris/Color Mismatch

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

Released 8/19/2019
GM Wiring Repair Strategy Information

Released 6/26/2019
Power Steering Noise or Fluid Leak from Power Steering Pump, Gear or High Pressure Hose During Extreme Low Temperature Conditions

Released 6/24/2019
Diagnostic Tip for Fuel System Contamination

Released 6/10/2019
2020 Chevrolet Silverado and GMC Sierra 2500HD-3500HD New Model Features

Released 5/17/2019
Oil Life Monitor Engine Control Module Update

Released 8/6/2020
Brake Squealing Noise

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

Released 6/26/2020
Diagnostic Tip - Service Stability System Message / MIL DTC U0131

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

Released 9/9/2019
ABS MIL and/or Service Stability Message with C050A and/or C0504 set

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 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
Duramax Intermittent High Idle Or Elevated Idle Descriptions

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 6/11/2020
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 6/5/2020
Diagnostic Tip - Trailer Lighting Complaints With Trailering App RPO U1D

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

Released 5/21/2020
Misfire Template

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

Released 4/27/2020
Speedometer Needle Accuracy Information

Released 4/9/2020
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 1/9/2020
Service Update - Incorrect Driver Display Message for Diesel Exhaust Fluid

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

Released 10/28/2019
Diagnostic Tip for Misfire, Malfunction Indicator Lamp (MIL) Illuminated - DTCs P0300, P0301, P0302, P0303, P0304, P0305,P0306, P0307 and/or P0308

Released 10/17/2019
Installation of Upfitter Auxiliary Switches (RPO 9L7)

Released 10/15/2019
Service Update - Incorrect Driver Display Message for Diesel Exhaust Fluid

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 8/7/2019
Installation of Upfitter Auxiliary Switches (RPO 9L7)

Released 7/30/2019
LIN Bus Diagnostic Information

Released 5/14/2019
Safety Recall - Diesel Engine Block Heater Cord

Released 6/1/2020
Fuel Pump Driver Control Module Configuration Function Missing in GDS2

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

Released 5/27/2020
Fuel Pump Driver Control Module Configuration Function Missing in GDS2

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 5/5/2020
Glow Plug Control Module Update

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

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 3/4/2020
SES MIL DTC P1005

Released 1/28/2020
Rough Running, Reduce Engine Power, Service Engine Soon (SES) light on, P0123 and P0222

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 1/6/2020
Customer Satisfaction Program - Air Inlet Panel Heat Shield May Detach

Released 12/18/2019
Customer Satisfaction Program - Air Inlet Panel Heat Shield May Detach

Released 12/6/2019
Air Filter Monitor Reset For Full Size HD Pick-Ups with 6.6L Diesel

Released 10/28/2019
Diagnostic Tip for Misfire, Malfunction Indicator Lamp (MIL) Illuminated - DTCs P0300, P0301, P0302, P0303, P0304, P0305,P0306, P0307 and/or P0308

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 7/31/2019
Information On AFM DFM Usage

Released 6/24/2019
Diagnostic Tip for Fuel System Contamination

Released 10/16/2019
Information on Low A/C Charge and No Leak Detected on Trucks with Low Mileage

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 10/1/2020
Engineering Information - Transmission Performance Issues without a Current or History DTC and Unable to Duplicate the Customer Concern (CCND)

Released 9/23/2020
Engineering Information - Engine Oil Found Under Vehicle

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

Released 9/9/2020
Engineering Information - Early, Late, Harsh and/or Slip Type Transmission Performance

Released 9/4/2020
2020-2021 Chevrolet Silverado GMC Sierra 2500HD 3500HD 10L1000 Automatic Transmission And Valve Body Restriction

Released 9/3/2020
Malfunction Indicator Lamp (MIL) Illuminated - DTCs P1338, P1339, P133A, P133B, P133C, P133D, P133E, P133E, P133F, P066A, P066B, P066C, P066D, P066E, P066F, P0671, P0672, P0673, P0674, P0675, P0676, P0677, P0678, P067A, P067B, P067C, P067D, P067E and/or P

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

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

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 7/16/2020
2020 Chevrolet Silverado GMC Sierra 2500HD 3500HD 10L1000 Automatic Transmission Exchange

Released 7/13/2020
Engineering Information - Engine Oil Found Under Vehicle

Released 7/13/2020
Engineering Information - Loud Banging Noise Heard from Rear of Vehicle While in Motion

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

Released 6/26/2020
Duramax Intermittent High Idle Or Elevated Idle Descriptions

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 6/16/2020
Exhaust Brake Feel

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 5/28/2020
Higher Than Expected Oil Consumption at 8600 GVW and Above

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

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 5/13/2020
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
Customer Satisfaction Program - High Idle Feature Not Available

Released 5/5/2020
Glow Plug Control Module Update

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

Released 5/4/2020
Information on Reduced Engine Power Message Displayed on the Driver Information Center (DIC), Malfunction Indicator Light (MIL) Illuminated - DTC P0106 and/or P014C Set

Released 5/4/2020
Identifying Non-GM ECM Calibration Use and Power-up Hardware Detection in Duramax Diesel Engines Using GDS 2

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 4/20/2020
Engineering Information – Service 4WD Message on Driver Information Center (DIC), DTCs C118D, C119B and/or C119C Set

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

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

Released 3/24/2020
Engineering Information – Service 4WD Message on Driver Information Center (DIC), DTCs C118D, C119B and/or C119C Set

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

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

Released 3/17/2020
Shifter Stuck In Park

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 2/19/2020
Service Update - Incorrect Driver Display Message for Diesel Exhaust Fluid

Released 2/19/2020
6.6L (L8T) Engine Exchange Program / Crankshaft Part Restriction has ended

Released 2/16/2020
Service Update - Engine Control Module Calibration Error

Released 1/28/2020
Rough Running, Reduce Engine Power, Service Engine Soon (SES) light on, P0123 and P0222

Released 1/17/2020
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 1/8/2020
Noise, Vibration, and/or Harshness Issues/Clunk Noise Heard During Coast Down Event

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

Released 10/29/2019
Information on Driveline Clunk Noise

Released 10/28/2019
Diagnostic Tip for Misfire, Malfunction Indicator Lamp (MIL) Illuminated - DTCs P0300, P0301, P0302, P0303, P0304, P0305,P0306, P0307 and/or P0308

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

Released 10/15/2019
Service Update - Incorrect Driver Display Message for Diesel Exhaust Fluid

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 10/10/2019
2020 Chevrolet Silverado GMC Sierra 2500HD 3500HD 10L1000 Automatic Transmission Exchange

Released 9/27/2019
DTCs P129F P16F3 P20EE P20FF P226D P249D P249E P11CC and / or P11D5 set.

Released 9/9/2019
6.6L Engine ( L8T) Engine Exchange Program/ Crankshaft Part Restriction

Released 9/5/2019
6.6L (L8T) Engine Exchange Program

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

Released 9/3/2019
DTCs P11CC P11D5 P20EE P226D P249E P249D

Released 8/23/2019
Diagnostic Tip to Identify Engine Misfiring and/or Malfunction Indicator Lamp (MIL) Illuminated - DTC P0300 Setting

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 8/15/2019
Engine Replacement After Severe Internal Engine Damage - Replace Intake Manifold

Released 8/13/2019
Information on Internal Engine Noise or Damage After Oil Filter Replacement

Released 8/12/2019
Information on Slight Vehicle Movement in Park at Start Up After Cold Soak

Released 8/1/2019
DTCs P11CC P20EE P226D P249E P249D

Released 7/31/2019
Information On AFM DFM Usage

Released 6/18/2019
6.6L (L8T) Engine Exchange Program

Released 6/11/2019
2020 Chevrolet Silverado GMC Sierra 2500HD 3500HD 10L1000 Automatic Transmission Exchange

Released 6/10/2019
2020 Chevrolet Silverado and GMC Sierra 2500HD-3500HD New Model Features

Released 5/17/2019
Oil Life Monitor Engine Control Module Update

Released 5/14/2019
Safety Recall - Diesel Engine Block Heater Cord

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 - Service Hood Striker Fracture

Released 6/16/2020
Safety Recall - Hood Striker Fracture

Released 6/4/2020
Safety Recall - Service Hood Striker Fracture

Released 3/20/2020
Safety Recall - Hood Striker Fracture

Released 5/14/2019
Safety Recall - Diesel Engine Block Heater Cord

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 6/26/2020
Diagnostic Tip - Service Stability System Message / MIL DTC U0131

Released 5/13/2020
Questions Regarding Reducing Tire Pressures

Released 5/8/2020
Customer Satisfaction Program - Incorrect Leaf Springs

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

Released 1/29/2020
Clunking Noise from Rear of Vehicle (Re-torque Leaf Spring Bolts)

Released 1/28/2020
Service Update - Inspect Lug Nut Torque - US Only

Released 1/24/2020
Service Update - Inspect Lug Nut Torque - US Only

Released 1/14/2020
Information on Cold Weather Steering Hose Upgrade Kit

Released 11/1/2019
Service Update - Steering Wheel Dither

Released 10/21/2019
Steering Wheel Oscillation, Vibration, Shake at 80-129 km/h (50-80 mph)

Released 10/14/2019
Normal Characteristic - Hydraulic Rush Noise from Power Steering Gear

Released 8/29/2019
Revised Wheel Balancer Mounting Instructions (Heavy Duty Models Only)

Released 6/26/2019
Power Steering Noise or Fluid Leak from Power Steering Pump, Gear or High Pressure Hose During Extreme Low Temperature Conditions

Released 6/17/2019
Rotor Retention Push Nut Removal Requirement for Accessory Wheel and Tire Installation

Released 9/3/2020
Malfunction Indicator Lamp (MIL) Illuminated - DTCs P1338, P1339, P133A, P133B, P133C, P133D, P133E, P133E, P133F, P066A, P066B, P066C, P066D, P066E, P066F, P0671, P0672, P0673, P0674, P0675, P0676, P0677, P0678, P067A, P067B, P067C, P067D, P067E and/or P

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

Released 8/24/2020
Rearview Camera Displaying Narrow Guidelines and Zoomed Out/Fisheye Appearance

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 6/18/2020
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 5/18/2020
Rear Camera Gridlines Incorrect, Misaligned, Offset, Incorrect Camera View after Replacing the Tailgate Handle or Entire Tailgate

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 3/25/2020
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 11/5/2019
J-35616-64B Or EL-35616-58 Terminal Test Probe Information/Repair

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

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