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 […]
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. […]
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 […]
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) […]
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 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 […]
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, […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 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 […]
Print Edition
Previous Articles
Hot and Cold – Summer Tire Performance and Cold Weather Cracking
Brake Fluid Leak in the Center of the Vehicle
Engine-Related Shudder Concerns
Overfilled Engine Coolant Reservoir with Discolored Coolant
DTC P06DD Set after Engine Oil Change
GM Service Know-How Emerging Issues
New GMC HUMMER EV Pickup – An All-Electric Supertruck
Ultium Battery System Powers the GMC HUMMER EV Pickup
Replacement Part Traceability with the Certified Service Mobile Toolbox
Exposed Trim at Front of Tonneau Cover
April Service Newsletter from the Experts at GM TAC
Replace Oil Cooler Components after Connecting Rod or Crankshaft Main Bearing Damage
New LPO Accessory Labor Operations Cover Calibration Programming
Battery Testing Guidelines and Warranty Battery Replacement
New Techline Connect Software Update Released
Reduced Engine Power Message
Wireless Phone Charger Reminder
Service Programming Direct Launch Handling
GM Dealer Equipment (GMDE)
GM EV Safety Gloves
TAC Newsletter June 2022
Techline Connect Setup
for Updates
