Installing HUMMER EV Accessories

Installing HUMMER EV Accessories

The 2022 HUMMER EV Pickup Edition 1 features a number of standard accessories, including assist steps, recovery hooks and a soft roll-up tonneau cover. (Fig. 1) There also are a […]

June 21, 2022
MDI Manager Software Update Splits MDI 1 and MDI 2 into Separate Applications

MDI Manager Software Update Splits MDI 1 and MDI 2 into Separate Applications

The Multiple Diagnostic Interface 1 & 2 (MDI/MDI 2) are designed to connect a vehicle to a host PC computer application for data transfer and Electronic Control Unit (ECU) reprogramming. […]

June 21, 2022
DEF Tank Heater and Wiring Harness Updates

DEF Tank Heater and Wiring Harness Updates

Several updates are now available to address Diesel Exhaust Fluid (DEF) tank, or Emission Reduction Fluid tank (Fig. 18), conditions on some full-size trucks and SUVs equipped with the 6.6L […]

June 21, 2022
Using R-99 or R-95 Diesel Fuel

Using R-99 or R-95 Diesel Fuel

GM Engineering has recently approved the use of renewable diesel, R-99 or R-95, for all 2006-2022 GM vehicles equipped with a diesel engine. (Fig. 25) Fig. 25 Renewable diesel (RD) […]

June 21, 2022
TCM DTCs Set on Vehicle Start Up

TCM DTCs Set on Vehicle Start Up

Some 2020-2022 Corvette models may have a Service Transmission message on the Driver Information Center (DIC), an illuminated Check Engine MIL and a squealing sound immediately after starting the engine. […]

June 21, 2022
June Service Newsletter from the Experts at GM TAC

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

June 21, 2022
Optimizing Fuel Economy with Top Tier Gasoline

Optimizing Fuel Economy with Top Tier Gasoline

Some of the best ways to help enhance fuel economy are through proper maintenance and good driving habits. For example, replacing the engine air filter at the recommended maintenance intervals, […]

May 31, 2022
FSE Technician Recognition Awards – 2nd Quarter 2022

FSE Technician Recognition Awards – 2nd Quarter 2022

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

May 31, 2022
Improper Headlamp or Turn Signal Operation Due to GM Accessory Illuminated Emblem

Improper Headlamp or Turn Signal Operation Due to GM Accessory Illuminated Emblem

Some 2020-2022 Sierra 1500, Sierra 2500/3500; and 2021-2022 Yukon models may have a driver-side headlamp or turn signal that stays on, flickers or is inoperative. The dealer-installed GM Accessory Illuminated […]

May 31, 2022
Transmission Neutral Service Mode on 10-Speed Automatic Transmissions

Transmission Neutral Service Mode on 10-Speed Automatic Transmissions

The 10L80 10-speed automatic transmission (RPO MHS, MQC) available on the new 2022 Silverado 1500 and Sierra 1500 features the Electronic Transmission Range Select (ETRS) system, which electronically shifts the […]

May 31, 2022
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. The latest service topics from GM Brand Quality and Engineering covered in […]

May 31, 2022
Get SAVI – New GM Service Advisor Vehicle Interface System Rollout Begins

Get SAVI – New GM Service Advisor Vehicle Interface System Rollout Begins

The national rollout (U.S.) of the Service Advisor Vehicle Interface (SAVI) – GM’s new service lane productivity and vehicle data documentation system – kicked off in April. Service Workbench Pro […]

May 16, 2022
DCBS Becomes Essential Equipment as Midtronics GR8 to be Discontinued in 2024

DCBS Becomes Essential Equipment as Midtronics GR8 to be Discontinued in 2024

In order to accurately diagnose a battery’s state of health from a vehicle in for service or that is part of the dealership’s inventory, the EL-52800 Diagnostic Charge Battery Station […]

May 16, 2022
Contaminated Charge Air Bypass Valve

Contaminated Charge Air Bypass Valve

Some 2011-2016 Cruze; 2012-2020 Sonic; 2013-2022 Encore and Trax models equipped with the 1.4L engine (RPO LUV) may experience several performance conditions, including loss of power, and an illuminated Check […]

May 16, 2022
Mismatched Replacement DEF Tank Harness Connector

Mismatched Replacement DEF Tank Harness Connector

Prior to replacing the Diesel Exhaust Fluid (DEF) tank on some 2020-2021 Silverado and Sierra models and 2022 Silverado 1500 LTD and Sierra 1500 Limited models, equipped with the 3.0L […]

May 16, 2022
Disengaged Tailgate Latch Handle

Disengaged Tailgate Latch Handle

The tailgate latch handle may become disengaged from the tailgate (Fig. 11) on some 2019-2021 Silverado 1500, Sierra 1500; 2022 Silverado 1500 LTD, Sierra 1500 Limited; and 2022 Silverado 1500 […]

May 16, 2022
May Service Newsletter from the Experts at GM TAC

May 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 […]

May 16, 2022