TCCM Drivability DTCs and Possible Low Battery Charge – 2019-2023 Chevrolet Silverado 4500 HD, 5500HD, 6500HD

2023 Chevrolet Silverado 6500HD

NHTSA ID Number: 10224305 Manufacturer Communication Number: PIP5853B Summary This PI communicates to dealers and technicians a possible diode issue in the TCCM, and how to properly diagnose for a diode issue.   Condition The vehicle may have a concern with the TCCM. causing DTC to set (see below) and possible a discharged battery. DTCs setting in … Read more

Appearance of Surface Cracks on Rotors – 2022-2023 Cadillac CT5

2023 Cadillac CT5

NHTSA ID Number: 10224306 Manufacturer Communication Number: PIC6476 Summary This Preliminary information communicates that the appearance of cracks on carbon ceramic rotors is normal and does not impact the performance or durability of the brake system.   Condition A customer may comment that the carbon ceramic rotors on their vehicle appear to have cracks on the surface of … Read more

Incorrect GPS Location On Radio Display – 2023 Cadillac Lyriq

2023 Cadillac LYRIQ

NHTSA ID Number: 10224308 Manufacturer Communication Number: PIC6477 Summary This Preliminary information communicates an engineering investigation for incorrect location when using GPS navigation.   Condition Customer may comment that the display screen will report an incorrect location when using GPS navigation.   Cause This is due to a software anomaly in the Telematics Communication Interface Control Module. … Read more

Yellow Tint to ZR1 Hood and Engine Cover Exposed Carbon Fiber Parts – 2019-2023 Chevrolet Corvette

2023 Chevrolet Corvette

NHTSA ID Number: 10219286 Manufacturer Communication Number: 19-NA-042 Summary This service bulletin provides information for dealers/technicians on a customer commenting on seeing a yellow tint appearance to hood and engine cover’s exposed carbon fiber parts.   Condition Some customers may comment the exposed carbon fiber engine appearance panels for the C8 generation vehicles, or the ZR1 exposed … Read more

Service Engine Soon Illuminated in Driver Information Center (DIC) and/or a Malfunctioning Fuel Gauge, DTC U0076/U18A2/P1001/P1434 or Other Message Counter Incorrect Codes Set – 2020-2022 Chevrolet Malibu

2022 Chevrolet Malibu

NHTSA ID Number: 10219289 Manufacturer Communication Number: 21-NA-186 Summary This service bulletin provides repair information to correct a customer concern of Service Engine Soon Illuminated in DIC and/or a Malfunctioning Fuel Gauge with DTC U0076/U18A2/P1001/P1434 or Other Message Counter Incorrect Codes Set.   Condition Some customers may comment on a Service Engine Soon (SES) light and/or a … Read more