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 9.1.1709.85) […]

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
New DCBS Software Update Now Available

New DCBS Software Update Now Available

A new software update (DCAG1-35-01) and database update (DCDG1-11) are now available for the EL-52800 Diagnostic Charge Battery Station (DCBS). All DCBS units should be updated to ensure battery testing […]

February 24, 2023
Air Suspension Low with Communication Codes Set

Air Suspension Low with Communication Codes Set

Some 2021-2023 Tahoe, Suburban, Yukon and Escalade models equipped with the air leveling suspension (RPO F47) may have a low or leaning suspension or the air leveling function may be […]

February 24, 2023
Dead Battery or Cruise Control Inoperative

Dead Battery or Cruise Control Inoperative

A no start condition due to a dead battery may be found on some 2023 Blazers along with intermittent cruise control operation. Along with these conditions, the brake lights may […]

February 24, 2023
February Service Newsletter from the Experts at GM TAC

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 […]

February 24, 2023
AFIT Adapter Cable Identification and Vehicle Application Chart Update

AFIT Adapter Cable Identification and Vehicle Application Chart Update

The Active Fuel Injector Tester (AFIT) Vehicle Application Chart (Fig. 8), which can help identify the correct cable adapters for each GM model, has been updated with the latest model […]

February 24, 2023