A/C Blows Warm Intermittently
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 […]
Bolt EV Battery Cell Inspection
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 […]
Certified Service Mobile Toolbox App Update Required by June 1
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 […]
What’s in a Name? – Tires Designed for Specific Truck Applications
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 […]
Corvette Brake Service Tips
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 […]
No Fob Detected Message
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 […]
Damaged Camshaft Position Sensor Exciter Wheel
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 […]
Excessive Resistance in Cable Causes Black Camera Screen
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. […]
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 […]
Let’s Take a Look – Remote Diagnostics Using Video Calls with Dealerships
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 […]
Latest Techline Connect Software Update Released
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) […]
Testing Setup and Valid Test Codes Key to Battery Warranty Claims
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 […]
FSE Technician Recognition Awards – 2nd Quarter 2021
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 […]
GM Accessory Cold Air Intake System Requires Calibration
The Chevrolet Performance, GMC and Cadillac Cold Air Intake System (RPO 5W7, RVK) available on 2021 Camaro, Silverado, Tahoe, Suburban, Sierra, Yukon and Escalade models equipped with the 5.3L V8 […]
Engine Overheating Message
Some 2019-2021 XT4, XT5, Blazer, Acadia; 2020-2021 CT4 and CT5 models equipped with the 2.0L 4-cylinder engine (RPO LSY) may have a possible engine overheating condition along with an Engine […]
False Park Assist Alerts
False Park Assist alerts (Fig. 20) may occur on some 2019-2021 Silverado and Sierra trucks when there is not an object in front and/or behind the vehicle. As a result […]
Latest Labor Time Guide Provides New Add Times for Transmission Repairs, Reduces Need for OLH
When performing internal transmission repairs on GM transmissions (Fig. 1) under warranty, current labor times focus on replacing the damaged part(s), with Other Labor Hours (OLH) as the only option […]
Latest GM Global Electronic Parts Catalog Update Enhances Part Filters for Better Search Results
The latest update to the GM Global Electronic Parts Catalog (EPC) has recently been released. It features several enhancements to help make parts searches easier and more efficient, including additional […]
Tips for USB Programming
Programming calibrations and software requires the transfer of large files to the vehicle from the Service Programming System (SPS). When transferring a large file (greater than 1 GB) from the […]
Remote Keyless Entry Transmitter Warranty Replacements
A new warranty requirement (U.S. only) is being implemented when replacing the Remote Keyless Entry (RKE) transmitter (key fob) (Fig. 12) under warranty on 2017-2022 GM vehicles equipped with Remote […]
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Previous Articles
Transmission Whine Sound
March Service Newsletter from the Experts at GM TAC
Vehicle Alignment and Super Cruise
Rear Axle Differential Lock Control Actuator Condition
Diesel Exhaust Fluid Supply Pipe Contamination
FSE Technician Recognition Awards – 1st Quarter 2024
Crankshaft Bearing Diagnosis
Convertible Top Water Leak
Power Tonneau Cover Tips
GM Service Know-How Emerging Issues
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 Dealer Equipment (GMDE)
TAC Newsletter March 2024
TAC Newsletter February 2024
Techline Connect Tips March 2023
