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. […]
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 […]
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 […]
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 […]
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 […]
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 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 […]
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 […]
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) […]
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 […]
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 […]
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) […]
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. […]
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, […]
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 […]
MDI 2 Advanced Setup Technical Tips Update
With the MDI Manager application software, the MDI 2 can be configured to communicate with a PC using several possible networks, such as a USB cable, ethernet cable, Wireless Local […]
Fuel Feed Pipe Buzzing Sound
Some 2017-2025 Camaro models equipped with the 6.2L V8 engine (RPO LT4) may have a buzzing, ticking or rattle sound coming from the passenger side of the vehicle. The sound […]
February 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 February GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
Exhaust Resonator Rattle
An exhaust rattle may be heard underneath the vehicle on some 2018-2024 Camaro models with the 3.6L engine (RPO LGX). The rattle may be most noticeable when starting the engine […]
Heated Steering Wheel Operation During a Remote Start
The 2023 XT5 and XT6 are available with two heated steering wheel options. These include the manual heated steering wheel (RPO UVD) and the automatic heated steering wheel (RPO KI3). […]
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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
