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 role of the Field […]
New 2023 Dealer Infrastructure & Security Guidelines
The new GM Dealer Infrastructure & Security Guidelines (DISG) are now available to help dealers with the technology needed to ensure reliable data communications, including recommended personal computer (PC) specifications. […]
December 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 December GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
New 2023 STC Course Catalog Released
The new 2023 GM Service Technical College (STC) Course Catalog (U.S.) is now available. (Fig. 6) The new catalog can be accessed through the Service Technician Training, Recruiting, Retention, and […]
GM Loan Tool Program Updates Tool Returns
The GM Loan Tool Program (LTP) has updated several policies recently to help address the shipping and administrative costs of the program. These changes included an increase in the annual […]
Latest Techline Connect Tips Shared by the TCSC
The Techline Customer Support Center (TCSC) has released their latest tips for Techline Connect and the Service Programming System. To get the most out of Techline Connect (TLC), check the […]
Intake Camshaft Sliding Lobe Pack DTCs
In cold ambient conditions (10°F / –12°C), DTCs P30C3 and/or P30BF, P30C7 and P30CB may set on some 2019-2022 Silverado, Sierra; and 2020-2022 CT4 models equipped with the 2.7L engine […]
New System Reset and Connector Reconnect Labor Codes
GM Brand Quality has introduced a new labor code for 2023 passenger cars and trucks to help isolate instances where a customer’s concern is remedied when a technician resets the […]
DTC Sets After Turbocharger Replacement
After the replacement of the turbocharger on some 2020-2023 Encore GX and 2021-2023 Trailblazer models equipped with the 1.2L engine (RPO LIH), DTC P0234 (Engine Overboost) may set in 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. This month the seminar reviews testing diesel fuel for DEF contamination. (Fig. 15) […]
Rear Axle Sound While Making Tight Turns
An audible clicking sound or chattering noise from the rear of the vehicle while making tight turns may be heard on some 2016-2023 LCF 3500/4500; 2017-2023 LCF 4500HD/4500XD, LCF 5500HD/5500XD; […]
Fuel Injector Causing Several DTCs to Set
Some 2022-2023 Corvette, Silverado, Tahoe, Suburban, Sierra, Yukon and Escalade models equipped with the 5.3L V8 engine (RPO L84) or 6.2L V8 engine (RPO L87, LT2) may have an illuminated […]
Charge Air Cooler Outlet Tube Connection
Reduced engine power may occur on some 2018-2022 Malibu, Equinox and Terrain models equipped with the 1.5L engine (RPO LYX, LFV) along with one or more of the following DTCs […]
Identifying a Transfer Case Seal or Prop Shaft Plug Leak
Automatic transmission fluid may be seen under the center of the vehicle on some 2015-2023 Escalade, Colorado, Express, Silverado 1500, Silverado 2500/3500, Tahoe, Suburban, Canyon, Sierra 1500, Sierra 2500/3500 and […]
V8 Engine Sounds
The 6.2L V8 engine (RPO L87) and 6.6L V8 engine (RPO L8T) may produce several different sounds under various conditions on some 2019-2023 Silverado 1500, Silverado 2500/3500, Tahoe, Suburban, Sierra […]
November 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 November GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
Remote Keyless Entry Transmitter Warranty Replacement Update
When replacing the Remote Keyless Entry (RKE) transmitter (key fob) (Fig. 1) under warranty on 2017-2023 GM vehicles equipped with Remote Keyless Entry/Passive Entry (RPO ATH) and Keyless Open/Start (RPO […]
FSE Technician Recognition Awards – 4th 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 […]
Park Brake Will Not Learn After Rear Brake Service
Some 2018-2023 Equinox and Terrain models may have DTC C0561 43 (System Disabled Information Stored – EEPROM Incorrect Programming) set and the park brake will not learn after rear brake […]
Print Edition
Previous Articles
MDI 2 Advanced Setup Technical Tips Update
Fuel Feed Pipe Buzzing Sound
February Service Newsletter from the Experts at GM TAC
Exhaust Resonator Rattle
Heated Steering Wheel Operation During a Remote Start
GM Service Know-How Emerging Issues
2024 Essential Tool Forecast
Headlamps Flashing Due to Low Battery Charge
PicoScope Recording for CVTs with Noise Concerns
Dual Clutch Transmission MCVM PUN Characterization
Shift to Park Message
2024 Technician Excellence Program Rewards Dealership Technicians for Training Achievements
Hands-Free Start Power Modes
Poor Ground Path Condition
Inoperative Trunk Latch
GM Dealer Equipment (GMDE)
TAC Newsletter April 2024
TAC Newsletter March 2024
Techline Connect Tips March 2023
