Diagnostic Tips

No Start, No Propulsion, Service Park Brake System Message or Dead 12 Volt Battery After A Over The Air Update (OTA) – 2022 GMC HUMMER EV

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2022 GMC Hummer EV

NHTSA ID Number: 10224288 Manufacturer Communication Number: PIT5944 Summary This Preliminary information communicates to the field how to address a condition that was caused by a over the air update.   Condition Some customers may experience one or more of the following concerns after a customer recently accepted an OTA update: 1. No Crank 2. No Propulsion 3. … Read more

Radio Remains On After RAP Is Canceled – 2018-2020 Chevrolet Trax

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2020 Chevrolet Trax

NHTSA ID Number: 10224289 Manufacturer Communication Number: PIT5945 Summary This Preliminary information communicates that engineering is aware of the radio RAP staying on concern and is working on a resolution.   Condition Radio remains on for up to 11 minutes after RAP is canceled.   Cause Pending Over The Air Update concern.   Correction: Engineering is aware … Read more

Instrument Panel Cluster May Be Inoperative Or Partially Illuminated – Service Alert Message May Be Displayed – 2022-2023 Chevrolet Corvette

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2023 Chevrolet Corvette

NHTSA ID Number: 10224293 Manufacturer Communication Number: PIC6475 Summary This Preliminary Information communicates diagnostic information to technicians for a black or blank IPC concern.   Condition Some customers may comment on a black or blank Instrument Panel Cluster (IPC) when the vehicle is first started. This may affect a portion of the IPC where half of it … Read more

Headlights On During Daylight Condition DTC B108E – 2022 Cadillac Chevrolet GMC

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Chevrolet GMC Cadillac

NHTSA ID Number: 10224296 Manufacturer Communication Number: PIT5936C Summary This Preliminary information communicates some customer may comment the headlights are on during daylight conditions with DTC B108E set.  Dealers are to reprogram the BCM with updated calibrations to correct this issue.   Condition Some customers may notice during daylight conditions that the Daytime Running Lamps (DRL’s) are … Read more

2-3 Upshift Slip or Flare – 2006-2023 Cadillac Chevrolet GMC Hummer

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General Motors

NHTSA ID Number: 10222832 Manufacturer Communication Number: 22-NA-185 Summary This informational bulletin explains how the trans slip or flare can be a normal condition.   Condition Some customers may comment on a 2-3 upshift slip or flare.   Cause This condition is a NORMAL characteristic of the transmission, it will not cause durability concerns and no repair … Read more