The replacement program (U.S.) for the 9T65 9-speed automatic transmission (RPO M3V, M3W) on 2018-2021 Enclave, Traverse; 2019-2021 Blazer; and 2020-2021 Acadia, XT5, and XT6 models (Fig. 1) has recently […]
When diagnosing an engine vibration condition that occurs when the vehicle is stationary or accelerating from a stop on some 4.3L V6 (RPO LV1, LV3), 5.3L V8 (RPO L82, L83, […]
The Automatic Stop/Start feature (Fig. 5) is no longer available on some 2021 model year vehicles due to the industry-wide shortage of semiconductors. The affected models include 2021 Silverado 1500, […]
Some 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models – equipped with the 6.6L Duramax diesel engine (RPO L5P), 10L1000 10-speed automatic transmission (RPO MGM, MGU) and the 2-speed transfer case […]
A Service Theft Deterrent message may be displayed on the Driver Information Center (DIC) on some 2018-2021 XT5 and 2020-2021 XT6 models equipped with RPO UTU (Vehicle Inclination Sensor) and […]
A dead battery as well as several other conditions, including slow engine crank, inoperative Auto Stop/Start (if equipped), radio on or fades out slowly after the ignition is off, and […]
Some 2020-2021 Blazers may have a number of various conditions occurring, such as multiple instrument cluster indicators illuminated, instrument cluster gauges dropping out, door locks cycling, inoperative passive entry and […]
Possible A/C refrigerant contamination may be causing the air conditioning to take longer than usual to cool the vehicle on some 2020-2021 Equinox and 2021 Blazer models. Check the latest […]
Updated battery inspection and reprogramming procedures for some 2017-2021 Bolt EV models have been released to help determine battery cell voltage performance. (Fig. 1) The repair procedure also includes reprogramming […]
The Certified Service Mobile Toolbox (CSMT) application, which includes the Pre-Repair Authorization (PRA) Process; Field Product Reporting (FPR) for U.S. dealerships or Product Information Reporting (PIR) for Canadian dealerships; and […]
The original tires installed on GM vehicles are designed and tested for specific vehicle applications. Full-size trucks feature a variety of different tires that are designed to perform under all […]
The 2020-2021 Corvette Stingray features two brake options. RPO JL9 is the base brake system, while the heavy-duty RPO J55 brake system is standard on all models with the Z51 […]
Some 2020-2021 CT4, CT5; 2021 Envision, Corvette, Tahoe, Suburban, Yukon and Escalade models may have a no crank/no start condition with a No Fob Detected message on the Driver Information […]
There may be an intermittent extended crank or intermittent crank/no start condition on some 2020-2021 Silverado, Sierra; and 2021 Tahoe, Suburban, Yukon, and Escalade models equipped with the 3.0L diesel […]
The infotainment screen on some 2020-2021 XT5, XT6 and Acadia models may intermittently show a black screen with red triangle and red camera icons when the vehicle is in Reverse. […]
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 […]
When working with the GM Technical Assistance Center (TAC) or a Field Service Engineer (FSE) on a challenging repair, the next best thing to the TAC agent or FSE actually […]
The May Techline Connect software update release includes a number of changes for the service application. The update should be downloaded automatically when logging in to Techline Connect. (Fig. 6) […]
Battery replacements made under warranty require that a number of items be completed properly in the dealership not only to support the warranty claim but to also ensure an accurate […]
MDI 2 Advanced Setup Technical Tips Update
Fuel Feed Pipe Buzzing Sound
February Service Newsletter from the Experts at GM TAC
Exhaust Resonator Rattle
Heated Steering Wheel Operation During a Remote Start
GM Service Know-How Emerging Issues
2024 Essential Tool Forecast
Headlamps Flashing Due to Low Battery Charge
PicoScope Recording for CVTs with Noise Concerns
Dual Clutch Transmission MCVM PUN Characterization
Shift to Park Message
2024 Technician Excellence Program Rewards Dealership Technicians for Training Achievements
Hands-Free Start Power Modes
Poor Ground Path Condition
Inoperative Trunk LatchGM Dealer Equipment (GMDE)
TAC Newsletter April 2024
TAC Newsletter March 2024
Techline Connect Tips March 2023
The EL-52800 Diagnostic Charge Battery Station (DCBS) is the recommended and approved tool for diagnosing battery replacements and submitting battery warranty claims. And effective January 1, 2024, the DCBS (Fig. […]
A new feature will make logging into Techline Connect easier and quicker for users. Previously, Techline Connect had its own unique login, using the Techline Connect desktop icon, and users […]
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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