New 9T65 Transmission Replacement Pilot Program Bulletin Information

New 9T65 Transmission Replacement Pilot Program Bulletin Information

The replacement program (U.S.) for the 9T65 9-speed automatic transmission (RPO M3V, M3W) on 2018-2021 Enclave, Traverse; 2019-2021 Blazer; and 2020-2021 Acadia, XT5, and XT6 models (Fig. 1) has recently […]

June 14, 2021
Engine Vibration Diagnosis

Engine Vibration Diagnosis

When diagnosing an engine vibration condition that occurs when the vehicle is stationary or accelerating from a stop on some 4.3L V6 (RPO LV1, LV3), 5.3L V8 (RPO L82, L83, […]

June 14, 2021
Auto Stop/Start No Longer Available on Certain 2021 Models

Auto Stop/Start No Longer Available on Certain 2021 Models

The Automatic Stop/Start feature (Fig. 5) is no longer available on some 2021 model year vehicles due to the industry-wide shortage of semiconductors. The affected models include 2021 Silverado 1500, […]

June 14, 2021
Transfer Case Misalignment May Lead to NVH Issues

Transfer Case Misalignment May Lead to NVH Issues

Some 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models – equipped with the 6.6L Duramax diesel engine (RPO L5P), 10L1000 10-speed automatic transmission (RPO MGM, MGU) and the 2-speed transfer case […]

June 14, 2021
Service Theft Deterrent Message

Service Theft Deterrent Message

A Service Theft Deterrent message may be displayed on the Driver Information Center (DIC) on some 2018-2021 XT5 and 2020-2021 XT6 models equipped with RPO UTU (Vehicle Inclination Sensor) and […]

June 14, 2021
LIN Bus Inputs Causing Intermittent Parasitic Draw

LIN Bus Inputs Causing Intermittent Parasitic Draw

A dead battery as well as several other conditions, including slow engine crank, inoperative Auto Stop/Start (if equipped), radio on or fades out slowly after the ignition is off, and […]

June 14, 2021
Loose Terminals Result in Multiple Conditions

Loose Terminals Result in Multiple Conditions

Some 2020-2021 Blazers may have a number of various conditions occurring, such as multiple instrument cluster indicators illuminated, instrument cluster gauges dropping out, door locks cycling, inoperative passive entry and […]

June 14, 2021
A/C Blows Warm Intermittently

A/C Blows Warm Intermittently

Possible A/C refrigerant contamination may be causing the air conditioning to take longer than usual to cool the vehicle on some 2020-2021 Equinox and 2021 Blazer models. Check the latest […]

June 14, 2021
Take the TechLink Survey Today

Take the TechLink Survey Today

At TechLink, our focus is to always bring you the latest on diagnostic and technical repair information, new model features and special tools operation, plus all the news that affects […]

June 14, 2021
Bolt EV Battery Cell Inspection

Bolt EV Battery Cell Inspection

Updated battery inspection and reprogramming procedures for some 2017-2021 Bolt EV models have been released to help determine battery cell voltage performance. (Fig. 1) The repair procedure also includes reprogramming […]

May 27, 2021
Certified Service Mobile Toolbox App Update Required by June 1

Certified Service Mobile Toolbox App Update Required by June 1

The Certified Service Mobile Toolbox (CSMT) application, which includes the Pre-Repair Authorization (PRA) Process; Field Product Reporting (FPR) for U.S. dealerships or Product Information Reporting (PIR) for Canadian dealerships; and […]

May 27, 2021
What’s in a Name? – Tires Designed for Specific Truck Applications

What’s in a Name? – Tires Designed for Specific Truck Applications

The original tires installed on GM vehicles are designed and tested for specific vehicle applications. Full-size trucks feature a variety of different tires that are designed to perform under all […]

May 27, 2021
Corvette Brake Service Tips

Corvette Brake Service Tips

The 2020-2021 Corvette Stingray features two brake options. RPO JL9 is the base brake system, while the heavy-duty RPO J55 brake system is standard on all models with the Z51 […]

May 27, 2021
No Fob Detected Message

No Fob Detected Message

Some 2021 Tahoe, Suburban, Yukon and Escalade models may have a no crank/no start condition with a No Fob Detected message on the Driver Information Center. The Remote Keyless Entry […]

May 27, 2021
Damaged Camshaft Position Sensor Exciter Wheel

Damaged Camshaft Position Sensor Exciter Wheel

There may be an intermittent extended crank or intermittent crank/no start condition on some 2020-2021 Silverado, Sierra; and 2021 Tahoe, Suburban, Yukon, and Escalade models equipped with the 3.0L diesel […]

May 27, 2021
Excessive Resistance in Cable Causes Black Camera Screen

Excessive Resistance in Cable Causes Black Camera Screen

The infotainment screen on some 2020-2021 XT5, XT6 and Acadia models may intermittently show a black screen with red triangle and red camera icons when the vehicle is in Reverse. […]

May 27, 2021
GM Service Know-How Emerging Issues

GM Service Know-How Emerging Issues

The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM certified repairs. The latest service topics from GM Brand Quality and Engineering covered in […]

May 27, 2021