Archive for March, 2023

When to Operate Four-Wheel Drive

When to Operate Four-Wheel Drive

Driving through mud, snow or rain on dirt, sand or dry pavement? Depending on the particular road conditions, what’s the best drivetrain choice – two-wheel drive, four-wheel drive, all-wheel drive? […]

March 31, 2023
Servicing Diesel Engines with Ceramic Glow Plugs

Servicing Diesel Engines with Ceramic Glow Plugs

When replacing ceramic glow plugs 2017-2019 Cruze; 2018-2019 Equinox, Terrain; 2020-2023 Silverado 1500, Silverado 2500HD/3500HD, Silverado 4500HD/5500HD/6500HD, Tahoe, Suburban, Sierra 1500, Sierra 2500HD/3500HD and Yukon models equipped with the 1.6L […]

March 31, 2023
Tips for Outside Rearview Mirror Glass Service

Tips for Outside Rearview Mirror Glass Service

Many 2022-2023 HUMMER EVs offer the GM Accessory Outside Rearview Mirror Projection Lights, which is an accessory illumination package that features an outside mirror with a HUMMER EV projection logo […]

March 31, 2023
Open Fuses Set Glow Plug DTCs

Open Fuses Set Glow Plug DTCs

The Check Engine MIL and several glow plug-related DTCs may be set on some 2024 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models equipped with the 6.6L Duramax diesel engine (RPO L5P). […]

March 31, 2023
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 31, 2023
To the Max – Achieving Success in the 2023 Technician Excellence Program

To the Max – Achieving Success in the 2023 Technician Excellence Program

GM dealership service technicians enrolled in the 2023 Technician Excellence Program (U.S.) are recognized and rewarded quarterly for achieving Gold Certification, Master Technician Certification (MTC), or World Class Technician (WCT) […]

March 24, 2023
MDI 2 Manager Software Update

MDI 2 Manager Software Update

A new software update for the MDI 2 Manager is continuing to roll out to GM dealerships (U.S.) The staggered rollout of the new MDI 2 Manager software (version 9.1.1766.85) […]

March 24, 2023
V8 Engine Crankshaft Bearing Conditions

V8 Engine Crankshaft Bearing Conditions

A no crank condition may be found on some 2019-2023 Silverado, Sierra; 2021-2023 Tahoe, Suburban, Yukon and Escalade models equipped with the 6.2L V8 engine (RPO L87). The no crank […]

March 24, 2023
Charge Air Cooler Icing

Charge Air Cooler Icing

Reduced engine power and an illuminated Check Engine MIL may be found on some 2019-2023 Silverado and Sierra models equipped with the 2.7L 4-cylinder turbo engine (RPO L3B). DTCs P0299 […]

March 24, 2023
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 previews the 2024 HUMMER EV SUV. (Fig. 12)   […]

March 24, 2023
Active Grille Shutters Front-End Noise

Active Grille Shutters Front-End Noise

Some 2021-2023 Escalade, Silverado, Tahoe, Suburban, Sierra and Yukon models may be producing a thump, clunk, pop or click noise at the front end of the vehicle. (Fig 1) The […]

March 14, 2023
2024 Models Included in Latest AFIT Software Update

2024 Models Included in Latest AFIT Software Update

The latest software update (V18.00) for the CH-47976 Active Fuel Injection Tester (AFIT) has recently been released. The software should be downloaded to ensure proper functionality of the AFIT. It […]

March 14, 2023
Fuel Feed Pipe Restriction

Fuel Feed Pipe Restriction

Some 2021-2023 Escalade, Silverado 1500, Tahoe, Suburban, Sierra 1500 and Yukon models equipped with the 5.3L V8 engine (RPO L82, L84) or 6.2L V8 engine (RPO L87) may have Reduced […]

March 14, 2023
Radio Remains On After OTA Update

Radio Remains On After OTA Update

After an Over-the-Air (OTA) software update on some 2021-2022 Corvette and 2022 Envision models, the radio may not turn off after the vehicle’s ignition has been turned off and the […]

March 14, 2023
Infotainment Settings Menu not Accessible on LCF Models

Infotainment Settings Menu not Accessible on LCF Models

The Settings menu on the infotainment screen may not be accessible on some 2021-2023 LCF 3500HD, 4500/4500HD, 5500/5500XD, 6500XD and 7500XD models equipped with the optional Alpine radio (RPO UIZ). […]

March 14, 2023