Diagnosing the Keyless Entry System
Some 2019-2025 Silverado, Sierra; 2021-2025 Tahoe, Suburban, Yukon and Escalade models may have a keyless entry condition (Fig. 1) with a Service Keyless Entry message displayed on the Driver Information […]
Archive for December, 2024
December 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 December GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
Loose Exhaust System Fasteners
The exhaust system fasteners may be loose or damaged on some 2022 Silverado 4500HD/5500HD/6500HD trucks and 2023 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine […]
Service Leveling System Message
The Air Ride Adaptive Suspension may be inoperative on some 2024-2025 Silverado EV RST and Sierra Denali EV models. A Service Leveling System message may be displayed on the Driver […]
Corvette 5.5L V8 Engine Oil Change Service
When changing the engine oil on the 2023-2025 Corvette Z06 equipped with the 5.5L V8 engine (RPO LT6) (Fig. 11), it is critical to follow all steps in the Engine […]
Checking the Air Conditioning Condenser Line Seal Washers
If the air conditioning is not working or blows warm air on a 2024-2025 GM model, it may be due to a leaking condenser seal. The seal washers between the […]
Shifter Vibration or Rattle Sound
There may be a vibration felt in the shift lever assembly or a rattle or tapping sound heard near the instrument panel or center console on some 2020-2023 Encore GX […]
Tips on Identifying Diesel Fuel Contamination
Poor engine performance may be due to fuel contamination on some 2014-2019 Cruze models equipped with the 2.0L diesel engine (RPO LUZ); 2018-2019 Equinox and Terrain models equipped with the […]
Midtronics Diagnostic Charger DCA-8000P Announced as Essential Tool
The Midtronics Diagnostic Charger DCA-8000P (Fig. 6) is now an Essential Tool for all U.S. dealerships. The DCA-8000P is a state-of-the-art battery charger and tester that provides accurate testing, fast […]
Accessing Air Ride Adaptive Suspension Data
The Air Ride Adaptive Suspension (RPO F47), available on 2021-2024 Escalade, Tahoe, Suburban, Yukon; 2022-2025 HUMMER EVs; 2024-2025 Silverado EV and Sierra EV, adjusts the ride height of the vehicle […]
Aftermarket Exhaust System Conditions
Owners of 2020-2025 Corvettes may install an aftermarket exhaust system on their vehicle in an effort to change the performance characteristics or look of the system. However, a number of […]
Lower Case Extension and Oil Pan Comparison
When replacing the Lower Case Extension (LCE) (Fig. 12) on 2019-2025 Silverado 1500, Sierra 1500; 2020-2025 CT4; 2023-2024 Colorado and Canyon models equipped with the 2.7L engine (RPO L2R, L3B), […]
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. This month the seminar reviews diagnosing parasitic drains using the PicoScope. (Fig. 15) […]
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Previous Articles
Prelube Procedure Required Before Drive Belt Installation During Engine Replacement
New GM STC Program Guide Goes Digital, Offers Easy Navigation to the Latest Training Information
Identify Parts Before Shipping to the WPC
Follow the Links – Check Service Information for All the Details on Every Repair
Performing the Long Range Radar Sensor Module Learn Procedure
Enclave Front License Plate Bracket Installation
June Service Newsletter from the Experts at GM TAC
SPS Events Soon to Require Hard-Wired Connection to MDI 2
Techline Connect App Resources Now on Global Connect
Windows 10 Support Ending Soon
Multiple DTCs Set Due to Wiring Harness Damage
GM Service Know-How Emerging Issues
DCA-8000
Troubleshooting
Guide
TAC Newsletter August 2025
TAC Newsletter July 2025
Techline Connect Tips November 2024
CX Connect Case Creation Help + Tips and Tricks
