The GM Loan Tool Program (LTP) supplements the U.S. Essential Tool Program as a cost-effective alternative to purchases of high cost and/or infrequently used special tools. It does not replace […]
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 […]
Early orders of the next generation EL-52800 Diagnostic Charge Battery Station (DCBS) are now shipping from GM Dealer Equipment. Its capabilities will make it easier and faster to test a […]
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 […]
GM has recently released revised Dealer Infrastructure Guidelines (DIG) for 2020. The guidelines outline the dealership technology needed to ensure reliable data communications for all dealers, including recommended personal computer […]
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 […]
Update – Midtronics DCA-8000 Diagnostic Charger is the Only Accepted Battery Tester for Warranty Battery Replacement (U.S.)
Rear Leaf Spring Noise and Possible Fuel Contamination
2027 Bolt State of Charge and NACS Charging Tips
Fuse F17UA and Possible No Start Condition
Inoperative PTO on Silverado Medium-Duty Trucks
Create Custom Data Lists in GDS 2
Updated Transfer Case Input Shaft Seal Installation
A/C Leak Detection Dye for EVs
When and Why to Use Fuel Additives
GM Service Know-How Emerging Issues
Check 55-Way Connector if Glow Plug DTCs are Set
Setting Up Wired and Wireless MDI 2 Connections
MDI 2 Advanced Setup Technical Tips Update
April Service Newsletter from the Experts at GM TACDCA-8000
Troubleshooting
Guide
TAC Newsletter April 2026
TAC Newsletter March 2026
MDI-2 Connections and Advanced Setup 2026
CX Connect Case Creation Help + Tips and Tricks
The new 1.2L engine (RPO LBP), introduced in the 2025 Envista, Encore GX, Trax and Trailblazer, features E85 compatibility. As part of the updates to the Evaporative Emission (EVAP) system, […]
With the MDI Manager application software, the MDI 2 can be configured to communicate with a PC using several possible networks, such as a USB cable, ethernet cable, Wireless Local […]
Take a detailed look at a wide range of innovative features and advanced systems found on GM vehicles to gain a better understanding of proper operation. Each short video reviews how a feature works, highlights operating tips and shows ways to customize settings, if applicable.
Designed by WPZOOM
