Take the TAC Action Center Survey Today — Survey Closes Friday

Take the TAC Action Center Survey Today — Survey Closes Friday

The GM Technical Assistance Center (TAC) is inviting all technicians who have recently contacted a TAC Action Center to take a brief satisfaction survey. The results of the survey will […]

May 6, 2024
Corvette E-Ray Delivers Electrified AWD Performance

Corvette E-Ray Delivers Electrified AWD Performance

The new 2024 Corvette E-Ray pairs two separate propulsion systems to provide naturally aspirated V8 power with electrified responsiveness powered by eAWD (All-Wheel Drive), delivering all-weather capabilities with impressive performance. […]

April 30, 2024
Corvette E-Ray 12-Volt Lithium-Ion Battery

Corvette E-Ray 12-Volt Lithium-Ion Battery

The 2024 Corvette E-Ray uses two lithium-ion batteries — one for high-voltage functions with the front electric axle and one for low-voltage operations that replaces the traditional lead-acid 12V battery. […]

April 30, 2024
Power Liftgate Battery Draw Conditions

Power Liftgate Battery Draw Conditions

There may be a battery draw condition due false wake-up requests to the Body Control Module (BCM) on some 2022-2024 Tahoe, Suburban, Yukon and Escalade models equipped with the hands-free […]

April 30, 2024
April Service Newsletter from the Experts at GM TAC

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

April 30, 2024
New GM Tools and Equipment Program Announced

New GM Tools and Equipment Program Announced

A new GM Tools and Equipment program has recently been announced by GM that aims to quickly deliver the essential tools dealerships need while providing a world-class customer service experience. […]

April 19, 2024
Use Correct Labor Code for Tire Valve Stem Repairs

Use Correct Labor Code for Tire Valve Stem Repairs

A damaged valve stem is a common cause of a tire leak. The valve stem may have been damaged by normal wear and tear from road conditions or impacts or […]

April 19, 2024
Midtronics Diagnostic Charger DCA-8000P Now Approved Battery Warranty Tool

Midtronics Diagnostic Charger DCA-8000P Now Approved Battery Warranty Tool

The Midtronics Diagnostic Charger DCA-8000P is now an approved battery warranty tool in the GM Dealer Equipment and Tool program. The DCA-8000P (Fig. 4) is a state-of-the-art battery charger and […]

April 19, 2024
Exhaust Valve Electrical Connector Reconfiguration

Exhaust Valve Electrical Connector Reconfiguration

For the 2023 model year, there are two possible exhaust muffler designs available on Escalade models. (Fig. 6) The muffler design was changed later in the model year with a […]

April 19, 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 looks at updating the Diagnostic and Charge Battery Station […]

April 19, 2024
Transmission Whine Sound

Transmission Whine Sound

There may be a whine sound heard under light acceleration or when coasting on some 2023-2024 Colorado and Canyon models equipped with the 8L45 or 8L80 8-speed automatic transmission (RPO […]

March 29, 2024
March Service Newsletter from the Experts at GM TAC

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

March 29, 2024
Vehicle Alignment and Super Cruise

Vehicle Alignment and Super Cruise

After a wheel alignment, the Super Cruise system (RPO UKL) – Lane Active Safety-Keep Assist, Hands-Free Lane Following (Entire Speed Range) (Fig. 9) – may not center the vehicle properly […]

March 29, 2024
Rear Axle Differential Lock Control Actuator Condition

Rear Axle Differential Lock Control Actuator Condition

A Service All Wheel Drive message may be displayed on the Driver Information Center in some 2020-2023 Encore GX and 2021-2023 Trailblazer models equipped with the 1.3L engine (RPO L3T) […]

March 29, 2024
Diesel Exhaust Fluid Supply Pipe Contamination

Diesel Exhaust Fluid Supply Pipe Contamination

Some 2020-2024 Silverado 1500, Silverado 2500HD/3500HD, Sierra 1500, Sierra 2500HD/3500HD; 2021-2024 Tahoe, Suburban, Yukon and Escalade models equipped with the 3.0L diesel engine (RPO LZ0, LM2) or 6.6L diesel engine […]

March 29, 2024
FSE Technician Recognition Awards – 1st Quarter 2024

FSE Technician Recognition Awards – 1st Quarter 2024

The GM Field Service Engineer (FSE) Technician Recognition Awards (U.S.) celebrate the skill and dedication of dealership technicians who have recently worked with FSEs on challenging repairs. Technicians at GM […]

March 21, 2024
Crankshaft Bearing Diagnosis

Crankshaft Bearing Diagnosis

A growling, knocking or rhythmic thumping sound may be heard on some 4.3L engines (RPO LV3), 5.3L engines (RPO L82, L84) and 6.2L engines (RPO L87, LT1, LT2, LT4, L8T) […]

March 21, 2024
Convertible Top Water Leak

Convertible Top Water Leak

Some 2020-2024 Corvette convertible models may have a water leak around the side glass. The leak, which is found at approximately the middle rear of the side glass area (Fig. […]

March 21, 2024
Power Tonneau Cover Tips

Power Tonneau Cover Tips

The GM Accessory Power Tonneau Cover (part number 86575628 or 86595165) is available on 2022-2024 HUMMER EV Pickups. (Fig. 15) If the hard power-retractable tonneau cover is not operating properly, […]

March 21, 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 look at the “E-Phaser” cam phaser system […]

March 21, 2024