Some 2019-2020 Colorado and Canyon models equipped with the 8L90 8-speed automatic transmissions (RPO M5T) – VIN breakpoint from March 1, 2019 to End of Production – may have a […]

A harsh shift, shudder, surge or stall condition may be present on some 2021 Silverado, Tahoe, Suburban, Sierra, Yukon, and Escalade models equipped with the 6L80 or 6L90 6-speed automatic […]

There may be poor heater performance from the driver-side HVAC vents on some 2019-2021 Silverado and Sierra models and 2021 Tahoe, Suburban, Yukon and Escalade models. In some cases, the […]

2013-2019 ATS models equipped with the 2.0L 4-cylinder engine (RPO LTG) or 2.5L 4-cylinder engine (RPO LCV) may have a crank, no start condition with an intermittent Check Engine MIL […]

Some 2021 Silverado 1500 and Sierra 1500 trucks equipped with the 5.3L V8 engine (RPO L82) and 6L80 6-speed automatic transmission (RPO MYC) or the 5.3L V8 engine (RPO L84) […]

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 […]

Feedback on the pilot program for replacing the 9T65 9-speed automatic transmission (RPO M3V, M3W) (Fig. 6) instead of making internal repairs that is currently taking place at all GM […]

Some 2016-2020 CT6 and 2017-2019 ATS and CTS models may experience a fretting condition. This condition may cause a whining, whistle, squeaking or groaning sound during low-speed driving maneuvers (up […]

The GM Field Service Engineer (FSE) Technician Recognition Awards (U.S.) celebrate the skill and dedication of dealership technicians who have recently worked with FSE’s on challenging repairs. Technicians at GM […]

The EVAP line connection style has changed on the 2020-2021 Corvette equipped with the 6.2L V8 engine (RPO LT2). If a vehicle requires the EVAP system to be tested for […]

There may not be any transmission movement after replacing the transmission valve body on some 2015-2017 Escalade, Yukon Denali; 2015-2019 Corvette; 2015-2021 Silverado, Sierra; 2016-2018 CT6; 2016-2019 ATS, CTS; 2016-2021 […]

The Head-Up Display (HUD) image (RPO UV6) on some 2020-2021 Acadia models (Fig. 21) may be tilted or not level when displayed on the windshield. The tilted image may be […]

GM has announced an updated policy for refinishing aluminum wheels under warranty at U.S. dealerships on 2011-2021 passenger cars and trucks. (Fig. 1) Only cosmetic refinishing of wheels due to […]