In order to ensure successful and complete repairs are made when reprogramming control modules, GM is now reviewing module reprogramming warranty claim information and comparing it to Service Programming System […]

The 2019 Q3 Mark of Excellence (MOE) Technician Product Knowledge Test was recently made available to technicians enrolled in the MOE Service Technician program (U.S. only). The test measures technicians’ […]

After making engine repairs that included removing and installing the engine wiring harness on the right side of the 3.6L V6 engine (RPO LGZ) on some 2017-2019 Colorado and Canyon […]

Some 2017-2019 XT5 and 2017 LaCrosse models may have a Service Transmission message displayed on the Driver Information Center along with one or more of the following DTCs: P0722, P0729, […]

Some 2011-2015 Volt models and 2014-2016 ELR models may not shift out of Park. If this condition is present, there may be water intrusion in the X98 Hybrid/EV Battery Charger […]

Some 2019 Blazer models may have an illuminated air bag warning lamp on the instrument cluster and several Brake-related messages displayed on the Driver Information Center, including Service StabiliTrak, Service […]

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 […]

Bigger, stronger and more powerful than ever, the completely new 2020 Chevrolet Silverado 2500HD/3500HD (Fig. 1) and GMC Sierra 2500HD/3500HD (Fig. 2) trucks offer increased capability and an expanded range […]

The all-new 2020 Silverado HD (Fig. 9) and Sierra HD trucks offer two powertrain choices: the all-new 6.6L V8 gasoline engine (RPO L8T) paired with the 6-speed 6L90 automatic transmission […]

The all-new Allison 10-speed 10L1000 automatic transmission (RPO MGM, MGU) available on 2020 Silverado HD and Sierra HD models equipped with the 6.6L Duramax diesel engine combines enhanced performance, fuel […]

A spray-in bed liner (RPO CGN, PDL) is available on 2013-2014 Silverado HD 2500/3500, Sierra HD 2500/3500; 2014 Silverado 1500, Sierra 1500; and 2015-2019 Colorado, Silverado, Canyon and Sierra models. […]

The 2019 Silverado 4500HD/5500HD/6500HD is equipped with the 6.6L Duramax diesel engine (RPO L5D). The engine uses heat shrink clamps to secure the engine coolant hoses. (Fig. 24) If a […]

The ringtone on a mobile phone may sound continuously through the vehicle speakers after an incoming call on some 2018-2019 Sonic, Trax, Terrain; and 2019 Blazer, Camaro, Colorado, Equinox, Malibu, […]