Diagnosing Road Force

Diagnosing Road Force

The design of today’s modern vehicles — and the proper operation of many new components and systems — has led to the critical importance of properly balanced and low Road […]

October 4, 2023
2024 Battery Ratings Chart and Battery Maintenance Update

2024 Battery Ratings Chart and Battery Maintenance Update

The latest Original Equipment (OE) Battery Ratings chart for the 2024 model year is now available under the Reference Charts menu for use when testing OE batteries. (Fig. 1)   […]

September 27, 2023
Battery Testing in EVs

Battery Testing in EVs

Absorbent Glass Mat (AGM) 12V batteries are used in GM Electric Vehicles (EVs), including the 2017-2023 Bolt EV; 2022-2023 Bolt EUV; 2023-2024 LYRIQ (Fig. 4) and HUMMER EV, due to […]

September 27, 2023
Multifunction Inner Tailgate Disabling Procedure

Multifunction Inner Tailgate Disabling Procedure

The Chevrolet Multi-Flex Tailgate and GMC MultiPro Tailgate (RPO QK2) available on the 2022-2024 Silverado 1500, Silverado 2500/3500, Sierra 1500 and Sierra 2500/3500 offers enhanced access to the cargo box […]

September 27, 2023
Front-view Grille Camera Washer Nozzle

Front-view Grille Camera Washer Nozzle

The front-view camera washer nozzle may be leaking washer fluid on some 2022-2023 Silverado 1500 and Sierra 1500 models. (Fig. 7)   Fig. 7   Service Information or the Electronic […]

September 27, 2023
September Service Newsletter from the Experts at GM TAC

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

September 27, 2023
9-Speed Transmission Oil Level Control System Changes

9-Speed Transmission Oil Level Control System Changes

Several changes have been made to the 9-speed transmission (RPO M3W, M3F, M3H, M3G, M3T, M3V, M3U) automatic transmission fluid Oil Level Control system (OLC) for 2023-2024 Enclave, Encore GX, […]

September 21, 2023
Front Short Range Radar Module Bypass Jumper Connector

Front Short Range Radar Module Bypass Jumper Connector

The Super Cruise driver assistance feature (RPO UKL) on 2022 Tahoe, Suburban, Yukon; and 2022-2023 Escalade models uses front short-range radar to allow Super Cruise to perform lane-change maneuvers. When […]

September 21, 2023
Battery State of Charge Prevents Radio Programming

Battery State of Charge Prevents Radio Programming

When USB programming the radio (RPO IVD) on some 2023 Colorado, Canyon; 2023-2024 LYRIQ; and 2024 XT4, Blazer EV and Silverado EV models (Fig. 8), a message may display that […]

September 21, 2023
New Techline Connect Software Update Released

New Techline Connect Software Update Released

The September Techline Connect (TLC) software release includes several updates to enhance the performance of the application. The update should be downloaded automatically when logging in to Techline Connect. (Fig. […]

September 21, 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 takes an up-close look at the all-new 2024 Blazer […]

September 21, 2023
Clean Head Bolt Holes Before Cylinder Head Installation

Clean Head Bolt Holes Before Cylinder Head Installation

During any service repair on 2024 and earlier GM models that involves cylinder head removal, installation or replacement, it’s critical that all dirt, debris and coolant be cleaned from the […]

August 31, 2023
Maintaining Seat Belt and Retractor Guide Cleanliness

Maintaining Seat Belt and Retractor Guide Cleanliness

Some fleet drivers of BrightDrop EV vans may notice proper seat belt operation is affected by the cleanliness of the belt and retractor guide. Due to the high amount of […]

August 31, 2023
Latest AFIT Software Update Released

Latest AFIT Software Update Released

Software update V19.00 has been released for the CH-47976 Active Fuel Injection Tester (AFIT). It includes testing data for all vehicle programs launching through December 2023. The software should be […]

August 31, 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, which can help identify the correct cable adapters for each GM model, has been updated with the latest model year information. […]

August 31, 2023
August Service Newsletter from the Experts at GM TAC

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

August 31, 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 takes a look at the 2023 Corvette with the […]

August 31, 2023
Get ‘Em While They Last: 2024 Camaro Collector’s Edition

Get ‘Em While They Last: 2024 Camaro Collector’s Edition

As production of the sixth generation Camaro comes to an end, the legacy of the muscle car is being celebrated with a special Collector’s Edition (RPO Z4B) on the LT/RS, […]

August 18, 2023
Turning Off Transport Mode on EV Models

Turning Off Transport Mode on EV Models

Transport Mode, or Logistics Mode, is used to increase 12V battery stand time during transit as well as long periods of stand time in dealership inventory for traditional internal combustion […]

August 18, 2023
Upfitter Auxiliary Switch LED Indicators

Upfitter Auxiliary Switch LED Indicators

The LED “on” indicators on the upfitter auxiliary switches (RPO 9L7), located on the instrument panel, may not illuminate properly on some 2023 Silverado 1500, Sierra 1500; 2024 Silverado 2500/3500 […]

August 18, 2023