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 […]
Service department personnel and fleet managers looking to record odometer and engine hour values from new 2022 Silverado 1500 and Sierra 1500 models equipped with the base instrument cluster (RPO […]
Some four-wheel drive 2020-2022 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 10-speed automatic transmission (MGM, MGU) and transfer case MP 3023/2024 (RPO NQH) may have a Service 4WD […]
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 […]
The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the March GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
The GM Warranty Parts Center (WPC) has introduced a new part photo return process for parts replaced under warranty (U.S. only). The new process can help reduce the cost and […]
In the new Technician Excellence Program (U.S.), enrolled GM dealership service technicians can earn quarterly earnPOWER points based on their certifications across 11 service categories. (Fig. 6) Technicians are recognized […]
The GM Technical Assistance Center, or TAC, (U.S.) has established an Action Center for the all-new 2022 HUMMER EV. (Fig. 8) Fig. 8 TAC Action Centers are designed […]
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 TAC
Proper Use and Diagnostic Tips for NFC Key Cards
Camshaft Position Sensor Performance Diagnosis
Tick Sound at Idle on V8 Engines
March Service Newsletter from the Experts at GM TAC
CCND Labor Codes Updated for Infotainment Audio and Screen Conditions
FSE Technician Recognition Awards – 1st Quarter 2026
Radiator Inlet Hose Coolant Leak
Sending GDS 2 Session Logs to TAC Using CX Connect
Key Fob Synchronization Update
CT5-V Blackwing Precision Package Features High-Performance Cup Tires with Unique AppearanceDCA-8000
Troubleshooting
Guide
TAC Newsletter April 2026
TAC Newsletter March 2026
Techline Connect Tips November 2024
CX Connect Case Creation Help + Tips and Tricks
Safety Arc-Rated (AR) Personal Protection Equipment (PPE) is recommended to be used by technicians when servicing some high-voltage battery packs under certain scenarios on GM electric vehicles. The PPE that […]
The latest update to the MDI 2 Manager in Techline Connect (version 9.1.2752.177) includes support for new MDI 2 wireless dongles. The new wireless dongles are similar to the previously […]
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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