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
Trailering App Functionality and Diagnostic Tips

Trailering App Functionality and Diagnostic Tips

The in-vehicle trailering app (RPO U1D) included with the Advanced Trailering System available on the 2019-2021 Silverado 1500 and 2020-2021 Silverado 2500HD/3500HD and the ProGrade Trailering System available on the […]

August 18, 2021
Techline Connect Tips from the TCSC

Techline Connect Tips from the TCSC

Techline Connect brings together all the common resources technicians use every day for diagnosis and repairs in an all-in-one application, integrating Service Information, programming, diagnostics, vehicle information and other features. […]

August 18, 2021
New 2021 Engine Oil Capacities Chart

New 2021 Engine Oil Capacities Chart

A new Engine Oil Capacities chart (Fig. 10) for the 2021 model year is now available under the Reference Chart menu. The chart includes engine, RPO, specifications (liters and quarts) […]

August 18, 2021
Original Engine Oil Filter Leak

Original Engine Oil Filter Leak

Some new 2020-2021 XT5, XT6, Blazer, Camaro and Acadia models equipped with the 3.6L V6 engine (RPO LGX) may have an oil leak at the engine oil filter. (Fig. 12) […]

August 18, 2021
Low-Mileage 9T45/50/60 Transmission Diagnostic Tips

Low-Mileage 9T45/50/60 Transmission Diagnostic Tips

When diagnosing low-mileage 2020 Regal, Equinox; 2020-2022 Encore GX, Envision, XT4, XT5, XT6, Blazer, Malibu, Acadia, Terrain; and 2021-2022 Trailblazer models equipped with the 9T45 (RPO M3F, M3U), 9T50 (RPO […]

August 18, 2021
Bring Us Your Talent Campaign Aims to Build Technician Recruiting Efforts

Bring Us Your Talent Campaign Aims to Build Technician Recruiting Efforts

GM recognizes the value and skill that certified technicians bring to the service department and the impact the nationwide shortage of technicians is having on the industry. Retaining and recruiting […]

August 18, 2021
Incorrect Fuses may Lead to Inoperative Auto Stop/Start

Incorrect Fuses may Lead to Inoperative Auto Stop/Start

The Auto Stop/Start function (RPO KL9) may be inoperative on some 2019-2021 Silverado 1500 and Sierra 1500 models. In addition, the Check Engine MIL may be illuminated and DTCs P3055 […]

August 18, 2021
Inoperative Adaptive Cruise Control with DTC U0422

Inoperative Adaptive Cruise Control with DTC U0422

The Adaptive Cruise Control (RPO KSG) may be inoperative on some 2019-2021 XT5, XT6, Blazer and Acadia models along with an Adaptive Cruise Control Temporarily Unavailable message on the Driver […]

August 18, 2021
Digital Climate Controls Limited on Some 2021-2022 Models

Digital Climate Controls Limited on Some 2021-2022 Models

Feature content on 2021-2022 GM models is continuing to be affected by the industry-wide shortage of semiconductors. Beginning on August 23, 2021, some 2021 Silverado 1500 and Sierra 1500 models […]

August 18, 2021