New LPO Accessory Labor Operations Cover Calibration Programming

New LPO Accessory Labor Operations Cover Calibration Programming

GM has announced that new labor codes have been developed for installing PDI Dealer-Installed Factory Invoiced Options (LPO) that require calibration programming. (Fig. 1) Technicians should refer to the appropriate […]

April 5, 2022
Battery Testing Guidelines and Warranty Battery Replacement

Battery Testing Guidelines and Warranty Battery Replacement

When testing or charging a 12V battery in a vehicle that is in for service or is part of the dealership’s inventory, the EL-50313 Midtronics GR8 Battery Tester/Charger or EL-52800 […]

April 5, 2022
New Techline Connect Software Update Released

New Techline Connect Software Update Released

The March Techline Connect (TLC) software release includes several updates to aid navigation in the app as well as enhance screen formatting. The update should be downloaded automatically when logging […]

April 5, 2022
Reduced Engine Power Message

Reduced Engine Power Message

A Reduced Engine Power message may be displayed on the Driver Information Center of some 2020-2022 Encore GX and 2021-2022 Trailblazer models. The Check Engine MIL may be illuminated and […]

April 5, 2022
Wireless Phone Charger Reminder

Wireless Phone Charger Reminder

2020-2022 Corvette models feature a wireless phone charger pocket between the driver’s and passenger’s seatbacks. (Fig. 15) The charger is capable of charging the batteries of compatible mobile phones.   […]

April 5, 2022
Assessing Park Assist Sensor Damage

Assessing Park Assist Sensor Damage

The park assist sensors (Fig. 1) for Front and Rear Park Assist Systems (RPO UD7, UD5, UFQ, UKG, UKZ) on some 2018-2022 GM passenger cars, crossovers, trucks and SUVs may […]

March 25, 2022
New Technician Excellence Program Job Aids Help Track Technicians’ Progress

New Technician Excellence Program Job Aids Help Track Technicians’ Progress

Service technicians enrolled in the 2022 Technician Excellence Program (U.S.) by their dealership can use the GM Excellence Executive Dashboard found in the GlobalConnect App Center to monitor their progress […]

March 25, 2022
Inoperable Folding Rear Seat

Inoperable Folding Rear Seat

The 2nd-row bench seat on 2021-2022 Tahoe, Suburban, Yukon and Escalade models features a 60/40 split-folding function. (Fig. 12) On some models, the 60% side of the rear seat may […]

March 25, 2022
Possible Engine Overheating Condition

Possible Engine Overheating Condition

The turbocharged 2.0L 4-cylinder engine (RPO LSY) on some 2019 CT6; 2020-2022 CT4, CT5, XT5, XT6, Blazer, Acadia and 2021-2022 Envision models may experience an engine overheating or running hot […]

March 25, 2022
Transfer Sound Insulator When Installing 10-Speed Service Transmission

Transfer Sound Insulator When Installing 10-Speed Service Transmission

GM now offers remanufactured 10L80 and 10L90 10-speed automatic transmissions for some 2017-2020 rear-wheel-drive applications. The remanufactured transmissions do not include the transmission housing acoustic sound insulator cover as part […]

March 25, 2022
Aero Shutter Diagnostic Tips

Aero Shutter Diagnostic Tips

The aero shutters on some 2019-2021 Silverado 1500, Tahoe, Suburban, Sierra 1500, Yukon, Escalade; 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models may have several conditions that could potentially cause improper […]

March 16, 2022
FSE Technician Recognition Awards – 1st Quarter 2022

FSE Technician Recognition Awards – 1st 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 […]

March 16, 2022
Possible Condensation in Crankcase Pressure Sensor Assembly

Possible Condensation in Crankcase Pressure Sensor Assembly

There may be possible moisture or condensation freezing in the crankcase pressure sensor assembly on some 2019 CT6; 2019-2022 XT4; 2020-2022 CT4, CT5, XT5, XT6, Blazer, Acadia; and 2021-2022 Envision […]

March 16, 2022
Displaying the Odometer and Engine Hour Values

Displaying the Odometer and Engine Hour Values

Service department personnel and fleet managers looking to record odometer and engine hour values from new 2022 Silverado 1500 and Sierra 1500 models equipped with the base instrument cluster (RPO […]

March 16, 2022
Service 4WD Message with DTC C119E

Service 4WD Message with DTC C119E

Some four-wheel drive 2020-2022 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 10-speed automatic transmission (MGM, MGU) and transfer case MP 3023/2024 (RPO NQH) may have a Service 4WD […]

March 16, 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 […]

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

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

March 9, 2022