TCM DTCs Set on Vehicle Start Up
Some 2020-2022 Corvette models may have a Service Transmission message on the Driver Information Center (DIC), an illuminated Check Engine MIL and a squealing sound immediately after starting the engine. […]
Some 2020-2022 Corvette models may have a Service Transmission message on the Driver Information Center (DIC), an illuminated Check Engine MIL and a squealing sound immediately after starting the engine. […]
Some 2020-2022 Corvette Convertible models may have a power folding top that may not open. DTC B19E1 (Hard Top Stowed Signal) may be set. If the folding top will not […]
Many GM performance models are equipped with three-season performance tires, commonly referred to as “summer tires.” (Fig. 1) These high-performance tires have a special tread and compound that are optimized […]
A shudder or surge may be felt when driving at a steady speed on some 2014-2022 Corvette, Silverado, Sierra; 2015-2022 Tahoe, Suburban, Yukon, Escalade; 2016-2022 Camaro; 2020-2022 Silverado HD, Sierra […]
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. […]
There may be several power seat adjustment conditions found on some 2020-2021 Corvette, CT4, CT5; 2021 Envision, Escalade, Tahoe, Suburban and Yukon models. The seat adjustment conditions may include: The […]
The driver’s outside rearview mirror on some 2020-2022 Corvettes may have poor operation and appearance, including numerous lines shown in the mirror and a dim reflection at all times. (Fig. […]
The convertible top may not lower intermittently on some 2020-2021 Corvettes. DTC B19E4 (Hard Top Locked Closed Signal) SYM64 also may stored in history. SYM64 indicates that the folding top […]
GM Engineering is conducting transmission filter inspections on 2020-2021 Corvette models (U.S. only). The Tremec DCT TR9080 dual clutch transaxle (RPO M1L) features a transmission cartridge filter (Fig. 24) that […]
Some 2020-2021 Corvettes may experience several electrical concerns related to terminal retention issues at the instrument panel wiring harness fuse block (located at the passenger’s side of the instrument panel) […]
The Driver Information Center (DIC) thumbwheel control on the right side of the steering wheel on some 2021 Corvettes (Fig. 28) may not work when selecting any Information tiles, radio […]
The Buckle to Drive feature that prevents drivers from shifting out of Park until the seat belt is buckled will be included as standard equipment on more upcoming GM models, […]
The electrical hood release buttons (Fig. 11) may be inoperative and a Hood Ajar message may be displayed on the Driver Information Center on some 2020-2021 Corvette models. The hood […]
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 […]
When diagnosing an engine vibration condition that occurs when the vehicle is stationary or accelerating from a stop on some 4.3L V6 (RPO LV1, LV3), 5.3L V8 (RPO L82, L83, […]
Some 2020-2021 CT4, CT5; 2021 Envision, Corvette, Tahoe, Suburban, Yukon and Escalade models may have a no crank/no start condition with a No Fob Detected message on the Driver Information […]
A Service Transmission message or a Service Engine Soon message may be displayed on the Driver Information Center of some 2020-2021 Corvettes equipped with the DCT TR9080 transmission (RPO M1L) […]
GM’s new Vehicle Intelligence Platform, or VIP, currently used on 2020-2022 Corvette, CT4, CT5 and 2021-2022 Tahoe, Suburban, Yukon, Escalade and Envision models, offers increased capacity and the ability to […]
Some 2020-2021 Corvettes may display a Service Front Suspension Lift System message on the Driver Information Center (DIC). DTCs C103C (Left Front Strut Position Sensor Signal) and/or C103E sym64 (Right […]
The EVAP line connection style has changed on the 2020-2021 Corvette equipped with the 6.2L V8 engine (RPO LT2). If a vehicle requires the EVAP system to be tested for […]