The 2019 Camaro ZL1 1LE (Fig. 1) now offers an available 10-speed 10L90 automatic transmission (RPO MGL). Unique calibrations were developed for the transmission as well as the Electronic Limited […]

The 2017-2019 Camaro ZL1 (Fig. 6) and Camaro SS 1LE; 2018-2019 Camaro ZL1 1LE; and 2015-2019 Corvette models equipped with the 6.2L V8 engine (RPOs LT1, LT4, LT5) feature an […]

The driver’s seat cushion on the 2019 Colorado and Canyon was redesigned to provide better entry and egress as well as improved comfort. Depending on the position of the steering […]

When installing a chain and gear set on the Gen 5 4.3L V6 (RPO LV1, LV3), 5.3L V8 (RPO L83) or 6.2L V8 engine (RPO L86, LT1, LT4) in some […]

Some 2019 XT4 models equipped with the 2.0L 4-cylinder engine (RPO LSY) may have DTC P0238 (Turbocharger Boost Sensor Circuit High Voltage) set after service repairs were performed that required […]

A rotational clicking sound may be heard after the engine is turned off on some 2017-2019 Cruze, Malibu; 2018-2019 Enclave, Envision, LaCrosse, Regal, Equinox, Traverse, Terrain; and 2019 XT4 and […]

The new 2019 GM Service Technical College (STC) Course Catalog (U.S.) (Fig. 16) is now available at GMSTC.com. Each year, the course catalog is updated with the current GM STC […]

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 […]

As technicians are at the forefront of GM’s efforts to deliver the best customer service experience in the industry, new and enhanced tools and resources are always needed to help […]

GM and other automotive manufacturers have teamed up to co-sponsor an annual industry study of service managers across the United States and Canada to help better understand industry trends and […]

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, Silverado […]

GM’s Global Architecture, or Global A, electrical system does not allow control modules to be swapped between vehicles. (Fig. 10) This has been true since the first Global A vehicles […]

What’s the difference between setting up a control module, programming and reprogramming? Each one is done at different times based on the state of the control module. Here are some […]

There may be a transmission performance concern on some 2014-2017 Spark models equipped with the CVT7 continuously variable-ratio automatic transmission (RPOs M4M, MR8). (Fig. 12) The Check Engine MIL may […]

Several radio-related performance issues may appear if all steps are not completed when programming the radio on 2018-2019 Regal, ATS, CTS, XTS, Terrain; 2019 CT6, XT4, Blazer, Camaro, Colorado, Equinox, […]

An engine stumble or stall after startup on some 2010-2017 Equinox and Terrain models equipped with the 2.4L 4-cylinder engine (RPO LAF, LEA) may be caused by a faulty aftermarket […]

Chevrolet teamed up with premier off-road aftermarket supplier AEV (American Expedition Vehicles) to create the new 2019 Colorado ZR2 Bison (RPO ULV). (Fig. 1) Fig. 1   The unique Bison […]

The new trailering app (RPO U1D) available on the 2019 Silverado 1500 and Sierra 1500 (Fig. 8) uses the K68 Trailer Lighting Control Module (TLCM), or Trailer Interface Module, to […]

If a 2015-2019 GM model is being serviced for an automatic transmission operating condition or a vibration concern that can be duplicated, GDS2 should be used to aid in identifying […]