Archive for February, 2022

Corvette Brake Rotor Conditions

Corvette Brake Rotor Conditions

Some 2021-2022 Corvettes equipped with the Z51 Performance Package (Fig. 1) may have a brake pulsation or grinding sound when applying the brakes. There also may be a pitting condition […]

February 24, 2022
DEF Tank Wiring Harness Pinout Change

DEF Tank Wiring Harness Pinout Change

After replacing the wiring harness on the Diesel Exhaust Fluid (DEF) tank on some 2020-2022 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P), […]

February 24, 2022
Power Liftgate Actuator Removal Tips

Power Liftgate Actuator Removal Tips

The power liftgate actuators (Fig. 7) from some 2018-2022 Acadia, XT5 and 2020-2022 XT6 models that have been returned to the Warranty Parts Center show damage due to improper removal. […]

February 24, 2022
Intermittent Power Up, No Crank Condition

Intermittent Power Up, No Crank Condition

Some 2021-2022 Equinox and Terrain models equipped with the 1.5L engine (RPO LYX) may have an intermittent no crank condition, but the vehicle powers up normally. If the intermittent power […]

February 24, 2022
Envision Ambient Instrument Panel Lighting

Envision Ambient Instrument Panel Lighting

The instrument panel on 2021-2022 Envision models features ambient LED lighting. The chrome edge of the instrument panel surrounding the left and center sections illuminate with a thin light strip. […]

February 24, 2022
AFIT Software Update V16 Adds 2023 Models

AFIT Software Update V16 Adds 2023 Models

The latest software update (CH-47976-SWV16) for the CH-47976 Active Fuel Injection Tester (AFIT) has recently been released. The software update includes: 2023 model year database V19.00 updates for all vehicle […]

February 24, 2022
Cold Weather Driving and Tire Pressure Monitor System Diagnostic Tips

Cold Weather Driving and Tire Pressure Monitor System Diagnostic Tips

As a rule of thumb, tire pressure will change about 7 kPa (1 psi) for every 6°C (10°F) change in temperature – dropping when it gets colder outside and rising when it […]

February 16, 2022
Poor Engine Performance and Charge Air Cooler Icing Conditions

Poor Engine Performance and Charge Air Cooler Icing Conditions

In extremely cold weather conditions (0°F / –18°C or less), the charge air cooler (CAC) on some turbocharged engines may experience icing due to moisture build-up, restricting air flow and […]

February 16, 2022
Illuminated Service AWD Lamp with PTU DTCs Set

Illuminated Service AWD Lamp with PTU DTCs Set

Some 2017-2021 Acadia, XT5; 2018-2021 Enclave, Traverse; 2019-2021 Blazer; and 2020-2021 XT6 models equipped with the 2.0L engine (RPO LSY, LTG), 2.5L engine (RPO LCV) or 3.6L engine (RPO LFY, […]

February 16, 2022
2022 Model Year Rear Seat Infotainment Feature Changes

2022 Model Year Rear Seat Infotainment Feature Changes

For the 2022 model year, several changes have been made to the features of the Rear Seat Infotainment (RSI) system on Tahoe, Suburban, Yukon and Escalade models. (Fig. 17) These […]

February 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 […]

February 16, 2022
New Service Newsletter from the Experts at GM TAC

New Service Newsletter from the Experts at GM TAC

Looking for diagnostic advice or more insight about a tough repair from the professionals at the GM Technical Assistance Center? Beginning this month, we’re bringing their expertise to you with […]

February 4, 2022