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 […]
The 2nd-row bench seat on 2021-2022 Tahoe, Suburban, Yukon and Escalade models features a 60/40 split-folding function. (Fig. 12) On some models, the 60% side of the rear seat may […]
The turbocharged 2.0L 4-cylinder engine (RPO LSY) on some 2019 CT6; 2020-2022 CT4, CT5, XT5, XT6, Blazer, Acadia and 2021-2022 Envision models may experience an engine overheating or running hot […]
GM now offers remanufactured 10L80 and 10L90 10-speed automatic transmissions for some 2017-2020 rear-wheel-drive applications. The remanufactured transmissions do not include the transmission housing acoustic sound insulator cover as part […]
The aero shutters on some 2019-2021 Silverado 1500, Tahoe, Suburban, Sierra 1500, Yukon, Escalade; 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models may have several conditions that could potentially cause improper […]
The GM Field Service Engineer (FSE) Technician Recognition Awards (U.S.) celebrate the skill and dedication of dealership technicians who have recently worked with FSE’s on challenging repairs. Technicians at GM […]
There may be possible moisture or condensation freezing in the crankcase pressure sensor assembly on some 2019 CT6; 2019-2022 XT4; 2020-2022 CT4, CT5, XT5, XT6, Blazer, Acadia; and 2021-2022 Envision […]
November Service Newsletter from the Experts at GM TAC
Questions About Labor Times?
Stay Updated — IOK Radio Software and Connection Conditions
Key Fob Synchronization
CX Connect Features Updated in Latest Release
New SAVI Manager Release Updates USB Driver
Do Not Swap Control Modules
GM Service Know-How Emerging IssuesDCA-8000
Troubleshooting
Guide
TAC Newsletter December 2025
TAC Newsletter November 2025
Techline Connect Tips November 2024
CX Connect Case Creation Help + Tips and Tricks
All buttons on one key fob (Remote Keyless Entry transmitter) may be inoperative on some 2023-2026 Escalade, LYRIQ, Corvette, Silverado 1500, Silverado 2500HD/3500HD, Tahoe, Suburban, Sierra 1500, Sierra 2500HD/3500HD, Yukon; […]
To avoid wait times for technical support in the dealership, prior to contacting the GM Technical Assistance Center (TAC) and Techline Customer Support Center (TCSC) as well as and other […]
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.
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