Uneven or Leaning Air Ride Adaptive Suspension

Uneven or Leaning Air Ride Adaptive Suspension

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 […]

January 14, 2021
Configuring Driver Assistance Systems

Configuring Driver Assistance Systems

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 […]

January 14, 2021
Latest Dealer Infrastructure Guidelines Released for 2021

Latest Dealer Infrastructure Guidelines Released for 2021

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 […]

January 14, 2021
Rear Axle Clunk Sound

Rear Axle Clunk Sound

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. […]

January 14, 2021
Sunroof Drain Hose Extensions

Sunroof Drain Hose Extensions

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 […]

January 14, 2021
Knock Sensor Inspection

Knock Sensor Inspection

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 […]

January 14, 2021
Exhaust Charge DTC Diagnostics

Exhaust Charge DTC Diagnostics

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 […]

January 14, 2021
Transmission Shift Conditions

Transmission Shift Conditions

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. […]

January 14, 2021
Installing a Rearview Camera Kit

Installing a Rearview Camera Kit

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. […]

January 14, 2021
New Circuit/System Testing for Parasitic Draws

New Circuit/System Testing for Parasitic Draws

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 […]

December 21, 2020
Listen Up – 2021 Escalade Audio Technology

Listen Up – 2021 Escalade Audio Technology

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 […]

December 21, 2020
Air Conditioning Compressor Failure

Air Conditioning Compressor Failure

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 […]

December 21, 2020
Trailer Lighting Conditions with the In-Vehicle Trailering App

Trailer Lighting Conditions with the In-Vehicle Trailering App

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 […]

December 21, 2020
Common Tire Concerns and Warranty Coverage

Common Tire Concerns and Warranty Coverage

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 […]

December 21, 2020
Pre-Delivery Inspection Forms Available on GlobalConnect App, No Longer in Service Information

Pre-Delivery Inspection Forms Available on GlobalConnect App, No Longer in Service Information

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 […]

December 21, 2020
Bluetooth and Phone Projection TAC Worksheet

Bluetooth and Phone Projection TAC Worksheet

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 […]

December 21, 2020
GM Service Know-How Emerging Issues

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 latest service topics from GM Brand Quality and Engineering covered in […]

December 21, 2020