Some 2021-2022 Silverado, Sierra, Tahoe, Suburban, Yukon and Escalade models equipped with the 2.7L engine (RPO L3B) or 3.0L diesel engine (RPO LM2) and the 10L80 automatic transmission (RPO MQB, […]
DTC P06DD (Engine Oil Pressure Control Solenoid Valve Performance) may set during the first engine start up immediately following an engine oil and filter change on some 2019-2022 Silverado and […]
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 the first GM truck designed around an electric vehicle (EV) propulsion system, the all-new 2022 GMC HUMMER EV Edition 1 Pickup (Fig. 1) offers some unique performance capabilities, including […]
The all-new 2022 GMC HUMMER EV Edition 1 Pickup is powered by an Ultium 24-module battery system that boasts a GM-estimated 1,000 horsepower and a combined axle torque of 11,500 […]
Replacement Part Traceability (RPT) is a new dealer process to document and track critical part serial numbers via the Certified Service Mobile Toolbox (CSMT) application. A field action, service bulletin, […]
Some 2021 Silverado 1500, Sierra 1500; 2022 Silverado 1500 LTD and Sierra 1500 Limited models equipped with the accessory tonneau cover (RPO VPB) may have the trim exposed at the […]
The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the April GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
If a gasoline engine is being replaced on a 2000-2022 GM passenger car or truck due to a connecting rod or crankshaft main bearing failure (Fig. 27), there are several […]
GM has announced that new labor codes have been developed for installing PDI Dealer-Installed Factory Invoiced Options (LPO) that require calibration programming. (Fig. 1) Technicians should refer to the appropriate […]
When testing or charging a 12V battery in a vehicle that is in for service or is part of the dealership’s inventory, the EL-50313 Midtronics GR8 Battery Tester/Charger or EL-52800 […]
The March Techline Connect (TLC) software release includes several updates to aid navigation in the app as well as enhance screen formatting. The update should be downloaded automatically when logging […]
A Reduced Engine Power message may be displayed on the Driver Information Center of some 2020-2022 Encore GX and 2021-2022 Trailblazer models. The Check Engine MIL may be illuminated and […]
2020-2022 Corvette models feature a wireless phone charger pocket between the driver’s and passenger’s seatbacks. (Fig. 15) The charger is capable of charging the batteries of compatible mobile phones. […]
The park assist sensors (Fig. 1) for Front and Rear Park Assist Systems (RPO UD7, UD5, UFQ, UKG, UKZ) on some 2018-2022 GM passenger cars, crossovers, trucks and SUVs may […]
Service technicians enrolled in the 2022 Technician Excellence Program (U.S.) by their dealership can use the GM Excellence Executive Dashboard found in the GlobalConnect App Center to monitor their progress […]
Water Leak on Front Passenger Floor
Power Lines Affecting Electrical System of Upfitted Vehicles
Search TAC Resolutions in CX Connect
GM Service Know-How Emerging Issues
Inoperative Sunroof Due to Air Deflector Clips
Headlamp Cooling Fan Humming Sound
September Service Newsletter from the Experts at GM TAC
Faster Case Response Times in CX Connect
Ground Fault at the Transmission Case
Sunshade Lamp Supply Circuit Draw
Transmission Park Lock Valve Parts Released
Automatic Transmission Fluid Appearance and ColorDCA-8000
Troubleshooting
Guide
TAC Newsletter October 2025
TAC Newsletter September 2025
Techline Connect Tips November 2024
CX Connect Case Creation Help + Tips and Tricks
The latest Original Equipment (OE) Battery Ratings chart for the 2026 model year is now available under the Reference Charts menu for use when testing OE batteries. (Fig. 5) […]
The latest GM Dealer Infrastructure & Security Guidelines (DISG) have been updated with recommended firewall exceptions for Techline Connect applications. (Fig. 1) The following exception has been added and needs […]
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
