TechLink – Page 5

Techline Connect & GDS2 Split Update Released

The rollout of the Techline Connect and GDS2 split update continues this week. On August 6, 2025, changes to the way GDS2 operates was released to all GM dealerships in […]

August 6, 2025 —

Poor A/C Performance Due to Loss of Refrigerant

The fluorescent dye installed in the air conditioning refrigerant system of all current GM vehicles helps in locating leaks in the A/C system. Using the GE-42220 Universal 12V Leak Detection […]

July 31, 2025 —

Loss of A/C and Warm Air Conditions

There may be a loss of air conditioning, weak cooling or warm air coming out of the vents on some 2024-2025 Silverado 1500 and Sierra 1500 trucks. These conditions may […]

July 31, 2025 —

July 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 July GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]

July 31, 2025 —

Power Hood Closure Conditions

The power hood (RPO AHV) (Fig. 1) on some 2022-2025 HUMMER; 2024-2026 Silverado EV, Sierra EV; and 2025-2026 ESCALADE IQ models may not close or cinch shut properly. There may […]

July 23, 2025 —

Diesel Engine Oil Cooler Seal Leak

Some 2024-2026 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P) may have an engine oil leak. In many cases, the oil leak may […]

July 23, 2025 —

Check Grounds for No Start Condition

There may be a no start condition on some 2025-2026 Equinox and Terrain models. In addition, the starter may click and there may be several DTCs set in the Engine […]

July 23, 2025 —

Battery Cable Clamp Alignment Results in Low Voltage

Some 2023-2025 Colorado and Canyon models may have a no start condition, a possible dead battery and multiple messages displayed on the Driver Information Center. There also may be several […]

July 23, 2025 —

Upper Body Auxiliary Lamp Connection

The left or right rear upper body auxiliary lamp (Fig. 11) may not illuminate on some 2025-2026 ESCALADE IQ and ESCALADE IQL models. The upper body auxiliary lamp connector may […]

July 23, 2025 —

Anti-Chip Coating Appearance on Full-Size Trucks

All 2018-2026 Silverado 1500, Sierra 1500; and 2019-2026 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks have stone guard protection applied to the lower painted surfaces that provides added defense against stone […]

July 23, 2025 —

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. This month the seminar covers installing the accessory puddle lamps on the ESCALADE […]

July 23, 2025 —

OneCRM and Dealer Case Management System Migration

GM dealer support teams, including TAC, TCSC, DBC and others, will be going through training for the new flagship case management system OneCRM on July 7–18. We apologize for any […]

July 14, 2025 —

Prelube Procedure Required Before Drive Belt Installation During Engine Replacement

If the engine for a GM model needs to be replaced with a new engine or has to be overhauled, be sure to perform the Engine Prelubing procedure as part […]

June 30, 2025 —

New GM STC Program Guide Goes Digital, Offers Easy Navigation to the Latest Training Information

The new GM Service Technical College (STC) Program Guide (formally the GM STC Course Catalog) is now available on gmstc.com. The new guide has been restructured as a website to […]

June 30, 2025 —