Check the Date — Inspecting High Voltage Insulation Gloves
When working on any high voltage system on a GM vehicle, certified and tested high voltage insulation gloves must be worn. Certified and up-to-date Class “0” insulation gloves rated at […]
Interference Conditions Impact Forward Collision Warnings
The Forward Collision Alert system (RPO UEU) available on 2020-2023 XT6 models can detect and alert the driver that a front-end collision is imminent with a vehicle being followed as […]
Engine Oil Leak from Above Oil Filter
An engine oil leak from above the oil filter may be found on some 2016-2019 Cruze; 2016-2022 Malibu; 2018-2022 Equinox, Terrain; 2019-2022 Encore and Trax models equipped with the 1.4L […]
New Silverado 2500HD/3500HD and Sierra 2500HD/3500HD Brake Pads Available
A brake squeal condition may be heard on some 2020-2022 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models. (Fig. 15) The brake noise may caused by the lining shim friction material used […]
Camshaft Sliding Lobe Pack Binding
Some low-mileage 2022 Silverado, Sierra and CT4-V models equipped with the 2.7L turbocharged engine (RPO L3B) may have DTC P30BF (Intake Camshaft Profile Sleeve Position Sensor Performance) set in the […]
Search TAC Cases Using the Dealer Case Management System
The Dealer Case Management (DCM) system (U.S.) enables dealership technicians to create, update and search GM Technical Assistance Center (TAC) cases to help diagnose tough vehicle conditions more effectively and […]
Infotainment Setup Tips for Using Google built-in
The 2022 Silverado 1500, Tahoe, Suburban, Sierra 1500, Yukon and HUMMER EV feature the new Infotainment 3 Premium system (RPO IOK) with Google built-in compatibility1. (Fig. 3) Google built-in offers […]
August Service Newsletter from the Experts at GM TAC
The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the August GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
GM Service Know-How Emerging Issues
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 […]
Diagnostic Tips for Exhaust Charge DTCs
Several high-pressure exhaust charge DTCs may set on some 2019-2022 Silverado, Sierra; 2021-2022 Tahoe, Suburban, Escalade; and 2022 Yukon models equipped with the 5.3L engine (RPO L84) or 6.2L engine […]
EVAP System Leak Testing
Some 2021-2022 Encore and Trax models equipped with the 1.4L engine (RPO LE2) may have DTC P0442, (Evaporative Emission [EVAP] System Small Leak Detected) set in the ECM. The DTC […]
Rear Axle Moan During Turns
Some 2020-2022 CT4 and CT5 models equipped with the limited-slip differential (RPO G80) may have a moan sound during left or right turns. The condition may be caused by a […]
Exhaust Heat Shield Rattle
A rattle sound from under the vehicle while driving may be heard on some 2021-2023 Silverado 1500, Silverado 2500HD/3500HD, Tahoe, Suburban, Sierra 1500, Sierra 2500HD/3500HD, Yukon, Escalade; and 2022 Silverado […]
Residue on Liftgate Strut is not a Fluid Leak
Residue on the rear liftgate strut (Fig. 8) of some 2018-2020 Enclave, Traverse; 2020-2022 Acadia, XT5 and XT6 models is not a fluid leak that requires strut replacement. The residue […]
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Previous Articles
November Service Newsletter from the Experts at GM TAC
Questions About Labor Times?
Answers to the Latest FAQs in Service Information
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 Issues
DCA-8000
Troubleshooting
Guide
TAC Newsletter December 2025
TAC Newsletter November 2025
Techline Connect Tips November 2024
CX Connect Case Creation Help + Tips and Tricks
