Preventing Inadvertent Airbag Deployments

Preventing Inadvertent Airbag Deployments

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 […]

September 24, 2021
Convertible Top Front Latch Striker Adjustment

Convertible Top Front Latch Striker Adjustment

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 […]

September 24, 2021
Inoperative Door Locks with Various Communication DTCs Set

Inoperative Door Locks with Various Communication DTCs Set

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 […]

September 24, 2021
Front Seat Adjuster Track Assembly Available as Service Part

Front Seat Adjuster Track Assembly Available as Service Part

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 […]

September 24, 2021
Check for Required Calibrations before Installing GM Accessories

Check for Required Calibrations before Installing GM Accessories

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. […]

September 24, 2021
Limited or Reduced Propulsion Power Messages

Limited or Reduced Propulsion Power Messages

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 […]

September 24, 2021
New Accessory Wheel Lock Nuts Available for 2022 Model Year

New Accessory Wheel Lock Nuts Available for 2022 Model Year

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 […]

September 24, 2021
Transmission Cartridge Filter Return

Transmission Cartridge Filter Return

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 […]

September 24, 2021
The Blackwings Take Flight – New CT4-V Blackwing and CT5-V Blackwing are Most Track-Capable Cadillacs Ever

The Blackwings Take Flight – New CT4-V Blackwing and CT5-V Blackwing are Most Track-Capable Cadillacs Ever

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 […]

August 31, 2021
9T65 Transmission Replacement Program Ending Soon

9T65 Transmission Replacement Program Ending Soon

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 […]

August 31, 2021
Fuse Block or Junction Block Terminal Retention

Fuse Block or Junction Block Terminal Retention

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) […]

August 31, 2021
New Inserts Address Rear Leaf Spring Sounds

New Inserts Address Rear Leaf Spring Sounds

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 […]

August 31, 2021
VT40 CVT Transmission Slipping Condition

VT40 CVT Transmission Slipping Condition

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 […]

August 31, 2021
Inoperative Steering Wheel Thumbwheel Select Control Reset

Inoperative Steering Wheel Thumbwheel Select Control Reset

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 […]

August 31, 2021
9th-Gear Operation on 9-Speed Transmissions

9th-Gear Operation on 9-Speed Transmissions

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 […]

August 31, 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 […]

August 31, 2021