Diagnostic Tips

Overhead Roof Console Inoperative / Service Safety Restraints Message / Sunroof Inoperative / Dome Lights Inoperative / DTCs B1A7A and U1121 – 2021-2023 Cadillac Chevrolet GMC

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Chevrolet GMC Cadillac

NHTSA ID Number: 10224301 Manufacturer Communication Number: PIT5949 Summary This Preliminary information communicates an issue during start up that the following symptoms occur: – Service Safety Restraints System Message – Sunroof Inoperative – Sunshade Lights Inoperative – Dome Lights Inoperative – Power Liftgate Inoperative when using switch in overhead console – DTCs U1121 set in the BCM and B1A7A set in the … Read more

Repeat Front Wheel Speed Sensor DTC After Sensor Replacement – ABS Traction Stability Control MIL DTC C0505 C050B C0511 C0517 C0501 C0502 C0503 C0504 C0507 C0508 C0509 C050D C050E C050F C0510 C0513 C0514 C0515 C0516 and/or C050A – 2019-2023 Chevrolet Silverado & GMC Sierra 1500

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2023 Chevrolet Silverado 1500

NHTSA ID Number: 10224302 Manufacturer Communication Number: PIT5950 Summary This Preliminary information communicates an issue of the wrong part number WSS being installed during a service procedure and to warn dealership tech to make sure the correct part number WSS is installed.   Condition When replacing a front wheel speed sensor (WSS) it is critical that the … Read more

Rear View Camera Coaxial Related Issues-B395A – B395B – B395C – B101E – B101D – 2019-2022 Buick Cadillac Chevrolet GMC

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Chevrolet Buick GMC Cadillac

NHTSA ID Number: 10216358 Manufacturer Communication Number: PIT5921 Summary This Preliminary information communicates diagnostics aids for rear view camera issues that may be encountered.   Condition Some customers may comment on seeing a black screen and a triangle icon on the radio display when in reverse. Technicians may find one or more of the following DTC’s B395A, … Read more

Service Engine Soon Light/Message with DTCs P0606 or P0607 in the TCM – 2020-2022 Chevrolet Corvette

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2022 Chevrolet Corvette

NHTSA ID Number: 10216360 Manufacturer Communication Number: PIP5852 Summary This Preliminary information communicates an anomaly in the transmission control module to erroneously set diagnostic trouble codes.   Condition Service engine tell-tale or message with stored TCM DTCs or P0606 and or P0607   Cause TCM Software anomaly   3 Affected Products Vehicle MAKE MODEL YEAR CHEVROLET CORVETTE … Read more

AC Blows Warm or Poor Performance – 2020-2021 GM

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General Motors

NHTSA ID Number: 10216361 Manufacturer Communication Number: PIT5099F Summary This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.   Condition / Concern Customer may comment that … Read more