Tips on Identifying Diesel Fuel Contamination

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 […]

December 10, 2024
Midtronics Diagnostic Charger DCA-8000P Announced as Essential Tool

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 […]

December 10, 2024
Accessing Air Ride Adaptive Suspension Data

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 […]

December 10, 2024
Aftermarket Exhaust System Conditions

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 […]

December 10, 2024
Lower Case Extension and Oil Pan Comparison

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), […]

December 10, 2024
GM Service Know-How Emerging Issues

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) […]

December 10, 2024
New Features of the 2025 Escalade and ESCALADE IQ

New Features of the 2025 Escalade and ESCALADE IQ

The new 2025 Escalade and first-ever all-electric 2025 ESCALADE IQ boast iconic design, interior craftsmanship and the latest automotive technology. Each of these luxury full-size SUVs offer a number of […]

November 26, 2024
Follow All Guidelines to Determine Hybrid/EV Battery Stability, Return Shipping Requirements

Follow All Guidelines to Determine Hybrid/EV Battery Stability, Return Shipping Requirements

Before returning the high-voltage battery (Fig. 6) of the 2023-2025 LYRIQ; 2024-2025 Blazer EV, Equinox EV, Silverado EV, Sierra EV; 2022-2025 HUMMER EVs; and 2022-2025 BrightDrop models, there are a […]

November 26, 2024
New 2024 Dealer Infrastructure & Security Guidelines Update Firewall Exclusions and SPS USB Requirements

New 2024 Dealer Infrastructure & Security Guidelines Update Firewall Exclusions and SPS USB Requirements

With rapidly changing technology being utilized throughout the dealership environment, the GM Dealer Infrastructure & Security Guidelines (DISG) have been updated to help dealers maintain reliable data communications, establish security […]

November 26, 2024
Vehicle Speed Limitations

Vehicle Speed Limitations

There are several reasons why a speed limitation may be in place on 2020-2025 Corvette models (Fig. 14), such as an active Teen Driver mode or the convertible folding top […]

November 26, 2024
November Service Newsletter from the Experts at GM TAC

November 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 November GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]

November 26, 2024
Get Recognized for Your Training Achievements in the 2025 Technician Excellence Program

Get Recognized for Your Training Achievements in the 2025 Technician Excellence Program

The 2025 Technician Excellence Program (U.S.) recognizes and rewards enrolled dealership technicians for achieving technical training certifications and meeting other service criteria. Program criteria include training achievements in the Center […]

November 26, 2024
Enrollment Kicks Off for 2025 Mark of Excellence Program

Enrollment Kicks Off for 2025 Mark of Excellence Program

The Mark of Excellence program (U.S.) recognizes the achievements, professionalism and commitment of GM service technicians as well as other dealership personnel. For the 2025 program, enrolled technicians who meet […]

November 22, 2024
Proactive Alerts — 12V Battery Drain Detection for EVs

Proactive Alerts — 12V Battery Drain Detection for EVs

Proactive Alerts, a feature of OnStar Advanced Diagnostics, are designed to help predict specific types of potential performance degradation based on current vehicle data. Several new Proactive Alerts have been […]

November 22, 2024
New All-Electric 2025 ESCALADE IQ Shows Off Style and Performance

New All-Electric 2025 ESCALADE IQ Shows Off Style and Performance

The 2025 ESCALADE IQ, the first-ever all-electric full-size SUV from Cadillac, redefines the luxury SUV experience with an Ultium Platform delivering a Cadillac-estimated 460 miles of range, vehicle-to-home bidirectional charging […]

November 22, 2024
ANC Microphone Rattle

ANC Microphone Rattle

There may be a vibration or rattle sound in the body of the vehicle on some 2025 Equinox models. The vibration or rattle may be more noticeable under light load, […]

November 22, 2024
Servicing High-Voltage Batteries Before Replacement

Servicing High-Voltage Batteries Before Replacement

The high-voltage (HV) battery in 2022-2025 HUMMER EV; 2023-2025 BrightDrop, LYRIQ; 2024-2025 Blazer EV, Equinox EV, Silverado EV and Sierra EV models requires updated Battery Energy Control Module (BECM) calibrations […]

November 22, 2024
Using Multi-Factor Authentication for Techline Connect

Using Multi-Factor Authentication for Techline Connect

Multi-Factor Authentication (MFA) — an identity verification process that requires at least two methods of authentication, such as a password and a temporary passcode, to verify a user’s identity — […]

November 14, 2024
Techline Connect Install/Uninstall Guide Updated

Techline Connect Install/Uninstall Guide Updated

If an error occurs when launching the Techline Connect (TLC) application, the first solution is often to try to restart TLC. If the application still does not start correctly, it […]

November 14, 2024
Checking for Software Updates on EVs

Checking for Software Updates on EVs

Electric Vehicles (EVs) feature a number of electronic control modules that may require software updates. These updates are important to not only resolve operating issues, but also to enhance vehicle […]

November 14, 2024
Gross Combined Weight Message on the Driver Information Center

Gross Combined Weight Message on the Driver Information Center

There may be a GCW Overweight message displayed on the Driver Information Center of some 2022-2025 Silverado 1500, Sierra 1500; and 2024-2025 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with […]

November 14, 2024
Update: Google Maps Application Offline

Update: Google Maps Application Offline

Due to a recent update of the Google Maps application, an issue may arise in which the infotainment system (RPO IOK, IVD, IVE) has a persistent “Offline” icon in maps […]

November 14, 2024
GM Service Know-How Emerging Issues

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 takes a first look at the all-new 2025 Escalade […]

November 14, 2024