The Surround Vision camera system (RPO UV2) available on a variety of GM models displays an overhead view of the area surrounding the vehicle, along with front or rear camera […]

The Park Assist Control Module (PACM) may fall off the Controller Area Network (CAN) bus when other control modules are serviced on some 2020 CT5 models due to incorrect PACM […]

The Accessory Rear Seat Infotainment (RSI) system on some 2018-2020 Enclave and Traverse models (Fig. 6) equipped with ventilated front seats (RPO KU9) may power off when the vehicle doors […]

DTC P0747 (Transmission Control Solenoid Valve 1 Stuck On) may be setting at engine start-up when the transmission is in Park on some 2017-2019 Cruze; 2017-2020 Malibu; 2018-2020 Enclave, Envision, […]

An engine vibration condition may occur when the vehicle is stationary or accelerating from a stop on some 2014-2018 Silverado, Sierra; 2015-2020 Escalade, Tahoe, Suburban, Yukon; 2016-2019 CTS-V; 2016-2020 Camaro; […]

Some 2015-2018 Silverado and Sierra models and 2019 Silverado 2500/3500 and Sierra 2500/3500 models equipped with the 6.6L Duramax diesel engine (RPOs LML, L5P) and dual fuel tanks (23.5 gallon/89 […]

The horn may sound muffled, distorted or sounds only the high note on some 2018-2020 Enclave and Traverse models. These horn conditions may be caused by a frequency that distorts […]

Some 2020 XT4 models may have a brake squeal sound at low speeds. (Fig. 17) The front brake pads on some models may be susceptible to producing brake squeal.   […]

If a 2017-2020 Colorado or Canyon model will not move or the transmission slips when shifted into any gear range immediately after flat towing the vehicle, inspect the internal components […]

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 […]

When testing or charging a battery in a vehicle that is in for service or is part of the dealership’s inventory, it’s critical to get an accurate diagnosis of the […]

The GM Technical Assistance Center, or TAC, (U.S.) has established an Action Center for the all-new 2020 Cadillac CT5, the latest luxury sedan in Cadillac’s lineup. (Fig. 16)   Fig. […]

The 2019 Silverado 4500HD/5500HD/6500HD (Fig. 17) has a maximum vehicle speed that is based on the axle ratio of the truck. For example, if the truck has a 4.88 rear […]

Service Drivers Assist and Service Side Object Detection messages and/or a Super Cruise Temporarily Unavailable message may display on the Driver Information Center of some 2019-2020 CT6 models. DTC U0075 […]

Some 2017-2020 Impala models may have an air conditioning system that blows warm air. During diagnosis, it may be found that there is little to no refrigerant in the A/C […]

An illuminated Check Engine MIL may be seen while driving on some 2019-2020 XT4 models. One or more of the following DTCs may be set: B1011, P175F, and/or P25A2. In […]