Techline Connect, GM’s next generation diagnostic application, has released a new tool to help determine the condition of a vehicle’s battery. Battery Condition is determined using “Power of Green;” a […]
A new version of the GM Global Electronic Parts Catalog (EPC) will be released on October 17, 2020 with a number of enhanced features and functionality. (Fig. 1) The Q.link™-supported […]
The Rear Seat Media system available in the new 2021 Tahoe, Suburban, Yukon, and Escalade offers high-definition entertainment using two touchscreen displays and two infrared headsets. (Fig 8) Rear seat […]
After cycling a 3rd-row seat to the up position on some 2021 Tahoe, Suburban and Yukon models, the headrest may not return to or stay in the upright position. In […]
Some 2020-2021 Silverado and Sierra models equipped with the 3.0L turbocharged Duramax diesel engine (RPO LM2) may exhibit a lack of performance along with DTCs P003A (Turbocharger Boost Control Position […]
A potential oil leak from the camshaft carrier gasket may be found on some 2019 CT6; 2019-2021 XT4; 2020-2021 Acadia, Blazer, CT4, CT5, XT5 and XT6 models equipped with the […]
The particulate matter sensor protection tube performance diagnostic may set a false DTC P1488 (Particulate Matter Sensor Temperature Circuit High Voltage) on some 2020 Silverado and Sierra trucks equipped with […]
Some 2020-2021 XT5 and XT6 models equipped with Night Vision (RPO UV3) may show a green, pixelated display in the Driver Information Center when Night Vision is selected. There are […]
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 […]
Damage to electrical terminals can lead to inaccurate test results, difficult diagnosis and system failures. When servicing a suspected wire/terminal issue, be sure to check for the following conditions: Any […]
When installing Limited Production Option (LPO) accessory wheel kits sourced from your local ADI (Fig. 4), a TPMS (Tire Pressure Monitoring System) learn is required as part of the wheel […]
When GM dealerships (U.S.) order new vehicles with Limited Production Option (LPO) accessory wheel kits, the vehicles will arrive at the dealership equipped with transit wheels. The LPO wheels (Fig […]
All 2017–2021 Camaro 1LE models feature a vinyl hood wrap that is applied before the cars arrive at the dealership. (Fig. 10) Several procedures should be followed to clean the […]
Some 2018-2019 ATS, CTS, CT6, Corvette; 2018-2020 Express; 2018-2021 Camaro, Colorado, Silverado, Canyon, Savana, Sierra; and 2021 CT4 models equipped with the 8L45 or 8L90 8-speed automatic transmission (RPO M5T, […]
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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