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 […]
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 […]
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. […]
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) […]
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) […]
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 […]
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 […]
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 […]
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 […]
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 […]
The 2022 Chevrolet Bolt EUV is an all-new electric vehicle that builds on the success of the Chevrolet Bolt EV, with a 6-inch (15.2 cm) longer overall length and a […]
The 2022 Bolt EV and 2022 Bolt EUV are powered by a 65-kWh nickel lithium-ion high-voltage battery. The battery pack will be serviceable and some of the battery pack’s accessory […]
The GM Technical Assistance Center, or TAC, (U.S.) has established an Action Center for the all-new 2022 Chevrolet Bolt EUV and 2022 Bolt EV. (Fig. 14) Fig. 14 […]
If diagnosis for a transmission condition leads to the replacement of the Electronic Transmission Range Selector (ETRS) assembly on 2020-2022 CT4, CT5, XT4, XT5, XT6; and 2021-2022 Escalade models, keep […]
The Wireless Phone Charging option is no longer available on most 2021 Tahoe, Suburban and Yukon models beginning in July 2021 due to the industry-wide shortage of semiconductors. The wireless […]
Corvette E-Ray Delivers Electrified AWD Performance
Corvette E-Ray 12-Volt Lithium-Ion Battery
Power Liftgate Battery Draw Conditions
April Service Newsletter from the Experts at GM TAC
New Design Intake Manifold Addresses Poor Engine Performance
Free Spinning or Grinding Starter Sounds
May Service Newsletter from the Experts at GM TAC
New Battery Cell Chemistry Identification
GM Service Know-How Emerging Issues
New Trailer Tire Pressure Sensors Offer Increased Capability
Inoperative USB Port Diagnosis
Avoid the TUN# Label When Cleaning Transmission Cases
High-Pitched Whistling Sound at IdleGM Dealer Equipment (GMDE)
TAC Newsletter June 2024
TAC Newsletter May 2024
Techline Connect Tips June 2024
The design of today’s modern vehicles — and the proper operation of many new components and systems — has led to the critical importance of properly balanced and low Road […]
With the MDI Manager application software, the MDI 2 can be configured to communicate with a PC using several possible networks, such as a USB cable, ethernet cable, Wireless Local […]
Take a detailed look at a wide range of innovative features and advanced systems found on GM vehicles to gain a better understanding of proper operation. Each short video reviews how a feature works, highlights operating tips and shows ways to customize settings, if applicable.
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