Archive for June, 2021

Exhaust Control Valve Actuator Replacement

Exhaust Control Valve Actuator Replacement

Several exhaust-related DTCs may be set in the Engine Control Module on some 2020-2021 CT4 and CT5 models equipped with the 2.7L engine (RPO L3B) or 3.0L engine (RPO LGY). […]

June 29, 2021
Update: Silverado 2500HD/3500HD and Sierra 2500HD/3500HD Brake Pads

Update: Silverado 2500HD/3500HD and Sierra 2500HD/3500HD Brake Pads

Some 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models may have a brake squeal condition caused by the low scorch friction material used on the original brake pads. To reduce the […]

June 29, 2021
2022 OE Battery Ratings Chart

2022 OE Battery Ratings Chart

An updated Original Equipment (OE) Battery Ratings chart, with added specs for 2022 models, is now available for use when testing batteries using the EL-50313 GR8 Battery Tester/Charger and EL-52800 […]

June 29, 2021
Harsh Downshift and Upshift Conditions

Harsh Downshift and Upshift Conditions

A harsh 5-4 downshift and harsh 1-2 upshift may be felt on some 2017 Colorado and Canyon models equipped with the 8-speed 8L45 automatic transmission (RPO M5T). These shift conditions […]

June 29, 2021
Inoperative Hood Release Buttons

Inoperative Hood Release Buttons

The electrical hood release buttons (Fig. 11) may be inoperative and a Hood Ajar message may be displayed on the Driver Information Center on some 2020-2021 Corvette models. The hood […]

June 29, 2021
Squeak Sound from Exhaust System

Squeak Sound from Exhaust System

Some 2016-2021 Camaro models equipped with the 3.6L V6 engine (RPO LGX) may have a squeak sound coming from the exhaust system while driving over bumps. The sound may be […]

June 29, 2021
Performing Successful Warranty Reprogramming Events

Performing Successful Warranty Reprogramming Events

In order to ensure successful and complete repairs are made when reprogramming control modules, GM reviews module reprogramming warranty claim information and compares it to Service Programming System (SPS) reprogramming […]

June 29, 2021
Rear Seat Belt Comfort Guides No Longer Included on Some Vehicles

Rear Seat Belt Comfort Guides No Longer Included on Some Vehicles

Rear Seat Belt Comfort Guide packages for the second- and third-row seats, if equipped, are now available to order for 2022 XT4, XT5, XT6, Blazer, Traverse and Acadia models. These […]

June 29, 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 […]

June 29, 2021
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