The headlamps may be turning on automatically during daylight conditions instead of the Daytime Running Lamps (DRL) on some 2022 Tahoe, Suburban, Yukon, Escalade and 2022-2023 Corvette models. (Fig. 6) […]
Some 2019-2022 Silverado 4500HD/5500HD/6500HD models may an illuminated ABS, traction control and/or brake warning MIL along with several DTCs set. These conditions may be due to an out-of-adjustment wheel speed […]
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 […]
Technicians navigating in Service Information (SI) using the year, make and model (YMM) of a vehicle are used to seeing all service manual content for that vehicle displayed — that […]
The PF63 engine oil filter (Fig. 5) is the new recommended filter specification for 2020-2023 Silverado 2500HD/3500HD, Sierra 2500HD/3500HD, Express, Savana; and 2019-2023 Silverado 4500/5500/6500 models equipped with the 6.6L […]
Some 2022 Camaro, Colorado, Acadia, Canyon, XT5 and XT6 models equipped with the 3.6L V6 engine (RPO LGX, LGZ) may have an illuminated Check Engine MIL along with DTC P0331 […]
The power folding mirrors on the driver’s side and passenger’s side of the vehicle (Fig. 10) may appear to operate at different speeds on some 2019-2023 Silverado 1500, Sierra 1500; […]
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 […]
U.S. dealerships use the Battery Maintenance Report to identify vehicles in dealer inventory that require attention. (Fig. 1) The report, which is updated every day, indicates if a battery charge […]
When working on any high voltage system on a GM vehicle, certified and tested high voltage insulation gloves must be worn. Certified and up-to-date Class “0” insulation gloves rated at […]
The Forward Collision Alert system (RPO UEU) available on 2020-2023 XT6 models can detect and alert the driver that a front-end collision is imminent with a vehicle being followed as […]
An engine oil leak from above the oil filter may be found on some 2016-2019 Cruze; 2016-2022 Malibu; 2018-2022 Equinox, Terrain; 2019-2022 Encore and Trax models equipped with the 1.4L […]
A brake squeal condition may be heard on some 2020-2022 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models. (Fig. 15) The brake noise may caused by the lining shim friction material used […]
Some low-mileage 2022 Silverado, Sierra and CT4-V models equipped with the 2.7L turbocharged engine (RPO L3B) may have DTC P30BF (Intake Camshaft Profile Sleeve Position Sensor Performance) set in the […]
The Dealer Case Management (DCM) system (U.S.) enables dealership technicians to create, update and search GM Technical Assistance Center (TAC) cases to help diagnose tough vehicle conditions more effectively and […]
The 2022 Silverado 1500, Tahoe, Suburban, Sierra 1500, Yukon and HUMMER EV feature the new Infotainment 3 Premium system (RPO IOK) with Google built-in compatibility1. (Fig. 3) Google built-in offers […]
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 […]
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 […]
Several high-pressure exhaust charge DTCs may set on some 2019-2022 Silverado, Sierra; 2021-2022 Tahoe, Suburban, Escalade; and 2022 Yukon models equipped with the 5.3L engine (RPO L84) or 6.2L engine […]
Some 2021-2022 Encore and Trax models equipped with the 1.4L engine (RPO LE2) may have DTC P0442, (Evaporative Emission [EVAP] System Small Leak Detected) set in the ECM. The DTC […]
Corvette E-Ray Delivers Electrified AWD Performance
Corvette E-Ray 12-Volt Lithium-Ion Battery
Power Liftgate Battery Draw Conditions
April Service Newsletter from the Experts at GM TAC
New Design Intake Manifold Addresses Poor Engine Performance
Free Spinning or Grinding Starter Sounds
May Service Newsletter from the Experts at GM TAC
New Battery Cell Chemistry Identification
GM Service Know-How Emerging Issues
New Trailer Tire Pressure Sensors Offer Increased Capability
Inoperative USB Port Diagnosis
Avoid the TUN# Label When Cleaning Transmission Cases
High-Pitched Whistling Sound at IdleGM Dealer Equipment (GMDE)
TAC Newsletter June 2024
TAC Newsletter May 2024
Techline Connect Tips June 2024
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 […]
With the MDI Manager application software, the MDI 2 can be configured to communicate with a PC using several possible networks, such as a USB cable, ethernet cable, Wireless Local […]
Take a detailed look at a wide range of innovative features and advanced systems found on GM vehicles to gain a better understanding of proper operation. Each short video reviews how a feature works, highlights operating tips and shows ways to customize settings, if applicable.
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