TechLink

TCSC Top Issues This Week

The Techline Customer Support Center (TCSC) is available to help dealerships with diagnostic and programming issues related to Techline Connect (TLC) and the Service Programming System (SPS). TCSC has now […]

September 9, 2026 —

New Body Control Module Series: Unlocking Keyless Entry Functions

The Body Control Module (BCM) on GM models built on the Vehicle Intelligence Platform (VIP) — first introduced in the 2020 model year — acts as the central controller for […]

September 4, 2026 —

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 September seminar (10226.09V – U.S.) highlights the GM-60637 EVAP System Tester. (Fig. […]

September 4, 2026 —

Record Serial Numbers for Removed and Installed Components Under Certain Labor Operations

GM has recently announced that the serial numbers of removed and installed components must be recorded when certain labor operations are used. Tracking serial numbers helps link returned components to […]

September 4, 2026 —

Corvette 12-Volt Lithium-Ion Battery

The 2024-2026 Corvette E-Ray; 2026-2027 Corvette ZR1X; and 2027 Corvette Grand Sport X use two lithium-ion batteries — one for high-voltage functions with the front electric axle and one for […]

August 31, 2026 —

Control Module Reprogramming Selection Now Required in SPS

The latest Service Programming System (SPS) update in Techline Connect features a new option when selecting the SPS programming type. (Fig. 1) This new requirement is designed to help reduce […]

August 28, 2026 —

Becoming a World Class Technician – New Certification Requirements Coming in 2028

For more than two decades, GM World Class Technician (WCT) status has been the highest recognition a GM service technician can earn. (Fig. 3) Established in 2004, the program recognizes […]

August 28, 2026 —

Ethernet Cable Overlay for Telematic Control Module Interference

The low tire pressure MIL may be illuminated along with a message on the Driver Information Center on some 2024-2026 Acadia, Traverse; and 2025-2026 Enclave models. In addition, the tire […]

August 28, 2026 —

August Service Newsletter from the Experts at GM TAC

The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the August GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]

August 28, 2026 —

Inoperative Engine Cooling Fan

Some 2024-2026 Equinox and Terrain models may exhibit several engine cooling and air conditioning issues, including engine overheating, an inoperative cooling fan and inoperative air conditioning. DTC P0494 (Cooling Fan […]

August 14, 2026 —

Transmission Stuck in 1st Gear

The transmission may get stuck intermittently in 1st gear on some 2024-2026 Traverse, Acadia; and 2025-2026 Enclave models equipped with the 8-speed 8T65 automatic transmission (RPO MF8). If this occurs, […]

August 14, 2026 —

Gear Shift Control Module Contamination

If one of the Gear Shift Control Module buttons (Fig. 6) is stuck on a 2022-2026 Silverado 1500, Sierra 1500 or HUMMER EV, check for any liquid spills that may […]

August 14, 2026 —

New GM Parts Connect Delivers Smarter, Faster Parts Lookup

GM Parts Connect, GM’s next generation web-based parts catalog and ordering platform that launched in early July, has been built to help dealership personnel quickly identify, verify and order the […]

August 14, 2026 —

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 August seminar (10226.08V – U.S.) takes a look at the GM-53435 Brushless 3-Phase […]

August 14, 2026 —