Service Leveling System/Speed Limited Message Due to Aftermarket Modifications – 2021 Cadillac Chevrolet GMC

2021 Chevrolet Suburban

NHTSA ID Number: 10202399 Manufacturer Communication Number: PIT5854   Summary This Preliminary information communicates information on vehicle speed being limited due to aftermarket lower kit being installed on the vehicle.     Condition Some customers may comment on a Service Leveling System/Speed Limited message on DIC. Dealers may find no DTC’s present.   Cause This could be … Read more

HFV6 Engine Misfire On AFM Cylinders 2 or 5 – 2021 Cadillac Chevrolet GMC

2021 Chevrolet Camaro

NHTSA ID Number: 10202400 Manufacturer Communication Number: PIP5824   Summary This Preliminary information communicates a possible issue with the active fuel management rockers causing a misfire and the correction for this concern.     Condition A 2021 vehicle equipped with a HFV6 Gen2 engine with AFM may be brought into the dealership with misfires on cylinder 2 … Read more

Intermittent Extended Crank No Start – 2021 Cadillac Chevrolet GMC

2021 Chevrolet Tahoe

NHTSA ID Number: 10202402 Manufacturer Communication Number: PIP5823   Summary This Preliminary information communicates to technicians the need to reprogram the ECM for an intermittent crank/no start concern.     Condition: Some customers may experience an intermittent extended crank or intermittent no start. The vehicle will crank for 15 seconds until it times out. The vehicle will … Read more

Intermittent Extended Crank or Intermittent Crank No Start and DTC P0341 Set – 2021 Cadillac Chevrolet GMC

2021 Chevrolet Suburban

NHTSA ID Number: 10202403 Manufacturer Communication Number: PIP5822   Summary This Preliminary information communicates to technicians to advise dealership technicians to inspect the camshaft exciter wheel and replace it if necessary.     Condition: Some customers may experience an intermittent extended crank or intermittent crank/no start. The technician may find DTC P0341 set with the MIL illuminated. The vehicle … Read more

P0300 Setting After Bulletin 21-NA-154 Was Performed – 2021 Chevrolet Silverado & GMC Sierra

2021 Chevrolet Silverado

NHTSA ID Number: 10202406 Manufacturer Communication Number: PIP5816A   Summary This Preliminary information communicates    A customer vehicle may have a concern of a P0300 setting after bulletin 21-NA-154 has been performed. Unknown Engineering is looking it to this concern     Condition A customer vehicle may have a concern of a P0300 setting after bulletin 21-NA-154 has been … Read more