A water rush or gurgle sound from the heater core at the center of the instrument panel on some 2015-2019 Colorado and Canyon models may be caused by air ingestion […]

A Speed Limited or Reduced Propulsion Power message may display on the Driver Information Center (DIC) along with reduced power on some 2016-2019 Volts. The message may display for a […]

A ghost or phantom touch, where random touch inputs occur on the infotainment screen display, and/or the infotainment display is non-responsive to touch immediately after having been cleaned, wiped, or […]

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 […]

Some 2021 Tahoe, Suburban, Yukon and Escalade models equipped with the available Air Ride Adaptive Suspension (RPO F47) may have a suspension trim height that is too high or too […]

From Forward Collision Alert to Reverse Automatic Braking, the advanced driver assistance systems available on current GM models offer features that range from providing alerts and warnings to hands-free driving […]

GM has recently released the latest Dealer Infrastructure Guidelines (DIG) for 2021. The guidelines outline the dealership technology needed to ensure reliable data communications for all dealers, including recommended personal […]

Some 2015-2021 Colorado and Canyon models may have a clunking sound heard from the rear axle area when driving over railroad tracks and/or entering or exiting parking lots and driveways. […]

There may be a gurgle or sloshing sound heard on some 2021 Tahoe, Suburban, Yukon, and Escalade models equipped with a panoramic sunroof (RPO C3U). (Fig. 14) The sound may […]

A wiring harness condition or loose knock sensor bolt may be found on some 2020 Camaros with the 2.0L 4-cylinder engine (RPO LTG). The Check Engine light may be illuminated […]

Some 2019-2021 Silverado, Sierra; 2021 Tahoe, Suburban, Yukon, and Escalade models equipped with the 5.3L engine (RPO L84) or 6.2L engine (RPO L87) (Fig. 19) may have any of the […]

Some 2020 Silverado and Sierra models equipped with the 8-speed automatic transmission (RPO MQE) may have a slipping or improper shifting condition or may have defaulted to only one gear. […]

A factory provided rearview camera kit is available on 2013-2021 Express and Savana cutaway models as well as 2019-2021 Silverado 1500, Sierra 1500, 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models. […]

Components most likely to cause a parasitic draw on the 12V battery on GM models include switches, relays, LIN buses and control modules. A new voltage drop test in Service […]

The 2021 Escalade features industry-first AKG audio technology with an available 36-speaker AKG Studio Reference system that produces professional studio sound. AKG is known worldwide for microphones and headphones used […]

The air conditioning may not be getting cold enough or is blowing warm air on some 2018-2020 Malibu and 2019-2020 XT4 models. The A/C compressor on these models may have […]

If the trailer lighting on customers’ trailers connected to some 2019-2020 Silverado and Sierra models does not operate as expected, such as inoperative lighting, improper trailer detection, or intermittently flashing […]

As the weather turns colder in parts of the country, wreaking havoc on roads, chances for tire damage or irregular tire wear to occur become more prevalent. New GM vehicles […]

Dealership personnel looking for the Pre-Delivery Inspection (PDI) forms (Fig. 21) for current GM vehicles will find them through the PDI Forms app on GM GlobalConnect. PDI forms can no […]

Before calling the GM Technical Assistance Center (TAC) for any Bluetooth or phone projection (Apple CarPlay and Android Auto) concerns (Fig. 24), TAC has released a template to follow when […]