Side Blind Zone Alert Reset
The Side Blind Zone Alert indicator on some 2021-2023 CT4, CT5, Escalade, Tahoe, Suburban and Yukon models equipped with Super Cruise (RPO UKL or UKL and 00U/02O) may not operate […]
January 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 January GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
Maintaining Power to a Module Sent in for Warranty Analysis
In order to help GM Engineering identify the root cause and troubleshoot some component drains or logic lockups on 2000-2023 GM passenger cars and trucks, it’s critical that power to […]
Transfer Case Actuator Alignment
During diagnosis or repairs of the transfer case (RPO NQF) on some 2019-2023 Silverado MD 4500/5500/6500 models equipped with four-wheel drive, the transfer case learn procedure may not be completed […]
Sticking Charge Air Bypass Valve
Some 2021-2022 Envision, CT4, CT5, XT4, XT5, XT6, Blazer and Acadia models equipped with the 2.0L 4-cylinder engine (RPO LSY) may have DTC P0299 (Engine Underboost) set in the Engine […]
New Models Using VIP Require the MDI 2
The Vehicle Intelligence Platform (VIP) electrical architecture continues to power a growing number of new GM vehicles for the 2023 model year. The VIP architecture offers enhanced capacity and the […]
Service Power Steering Message Due to Coolant Temperature
A Service Power Steering message may be displayed on the Driver Information Center on some 2017-2023 XT5, Acadia; 2018-2023 Enclave, Traverse; 2019-2023 Blazer; and 2020-2023 XT6 models. DTC P0128 (Engine […]
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 […]
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Previous Articles
Transmission Whine Sound
March Service Newsletter from the Experts at GM TAC
Vehicle Alignment and Super Cruise
Rear Axle Differential Lock Control Actuator Condition
Diesel Exhaust Fluid Supply Pipe Contamination
FSE Technician Recognition Awards – 1st Quarter 2024
Crankshaft Bearing Diagnosis
Convertible Top Water Leak
Power Tonneau Cover Tips
GM Service Know-How Emerging Issues
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 Dealer Equipment (GMDE)
TAC Newsletter March 2024
TAC Newsletter February 2024
Techline Connect Tips March 2023
