When making vehicle repairs to or near the Supplemental Inflatable Restraint (SIR) system, technicians always need to consider the consequences. Even during repairs to components that are not directly connected […]
The convertible top may not lower intermittently on some 2020-2021 Corvettes. DTC B19E4 (Hard Top Locked Closed Signal) SYM64 also may stored in history. SYM64 indicates that the folding top […]
The door locks may become inoperative and several communication DTCs (U codes) may set on some 2020-2021 Acadia, XT5 and XT6 models. Other conditions that may occur include illuminated instrument […]
Diagnosing front seat movement conditions on 2016-2022 Malibu and 2019-2022 XT4 models requires verifying the operation of the seat adjuster track. If there are issues with fore/aft movement, binding or […]
After installing a number of select GM Genuine Accessories (Fig. 16), a calibration update from the Techline Customer Support Center (TCSC) is required in order to complete the installation properly. […]
Some 2016-2019 Volt models may display a Speed Limited to X MPH or Reduced Propulsion Power message on the Driver Information Center (DIC) and limited vehicle propulsion. (Fig. 18) These […]
Several new accessory wheel lock nuts with new designs will be available on some 2022 models. The new design wheel lock nuts, including chrome locks (RPO SFE) (Fig. 20) and […]
GM Engineering is conducting transmission filter inspections on 2020-2021 Corvette models (U.S. only). The Tremec DCT TR9080 dual clutch transaxle (RPO M1L) features a transmission cartridge filter (Fig. 24) that […]
The 2022 Cadillac CT4-V Blackwing (Fig. 1) and CT5-V Blackwing (Fig. 2) are, simply put, the most track-capable Cadillacs ever. Boasting power, handling, refinement and luxury that leverage a Cadillac […]
The pilot replacement program (U.S.) for the 9T65 9-speed automatic transmission (RPO M3V, M3W) (Fig. 16) on 2018-2021 Enclave, Traverse; 2019-2021 Blazer; and 2020-2021 Acadia, XT5, and XT6 models, which […]
Some 2020-2021 Corvettes may experience several electrical concerns related to terminal retention issues at the instrument panel wiring harness fuse block (located at the passenger’s side of the instrument panel) […]
A squeak or clunk sound from the rear leaf springs may be heard on some 2015-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models. The sound may be caused by the spring […]
There may be a slipping condition, a loss of forward gear and/or an illuminated Check Engine light on some 2019-2021 Malibu and 2020-2021 Trailblazer and Encore GX models equipped with […]
The Driver Information Center (DIC) thumbwheel control on the right side of the steering wheel on some 2021 Corvettes (Fig. 28) may not work when selecting any Information tiles, radio […]
Transmission operation on some 2018-2022 Terrain; 2019-2022 XT4; 2020-2022 Encore GX, XT5, XT6, Acadia; and 2021-2022 Envision and Trailblazer models may not be fully understood by owners, especially at highway […]
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 […]
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for Updates
Battery replacements made under warranty require that a number of items be completed properly in the dealership not only to support the warranty claim but to also ensure an accurate […]
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 […]
The Safety Alert Seat available on many GM models provides a vibration, or haptic warning, in the driver’s seat cushion to alert the driver of the direction of potential…
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