Diagnostic Tips

Intermittent Parasitic Battery Draw / Dead Battery / Slow Crank / Radio Stays On or Fades Slowly After RAP Cancel / (LIN Bus) – 2019-2020 Chevrolet Silverado & GMC Sierra

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2020 Chevrolet Silverado

NHTSA ID Number: 10201275 Manufacturer Communication Number: PIT5750A Summary This Preliminary information communicates an issue with the battery goes dead and provides diagnostics tips on inspecting the LIN bus.   Condition Some customers may comment of a dead battery. In addition to the dead battery, they may comment on any of the following items: – Slow engine … Read more

Fuel Tank Hard To Fill Possible MIL With DTC P0446 – 2018-2020 Chevrolet Equinox & GMC Terrain

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2020 Chevrolet Equinox

NHTSA ID Number: 10201280 Manufacturer Communication Number: PIP5496C Summary This Preliminary information communicates an issue inside the fuel tank where the fuel vent hose may be disconnected from the fuel pump module assembly and  recommended repair procedures.   Condition Fuel tank hard to fill with fuel, evaporative emission canister saturated with fuel and possible DTC P0446.   … Read more

Stop/Start System Malfunction, DTC P1064, P1065, P1068, P106F, P1070, P108D, P108E, or P1091 Set – 2016 Cadillac ATS, CTS

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2016 Cadillac ATS

NHTSA ID Number: 10201133 Manufacturer Communication Number: PI1518A Summary Stop/Start System Malfunction, DTS P1064, P1065, P1068, P1070, P108D, P108R, or P1091 Set – Equipped with Stop/Start System (RPO KL9)   Condition/Concern Some customers may comment that the message “Stop/Start System Disabled” appears on the DIC. There may be a poor ground terminal connection at G400.   Recommendation/Instructions … Read more

Engine Backfire and Related Driveability Issues – 1999-2002 Chevrolet & GMC B7 School Bus Chassis, C6/C7 Conventional Cab Medium Duty

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QUANTUM Technologies GM

NHTSA ID Number: 10195303 Manufacturer Communication Number: TSB-013 Summary Engine Backfire and Related Driveability Issues   This bulletin is being issued to assist technicians in efficiently diagnosing and correcting backfire and other related driveability concerns. When a vehicle is identified with a backfire it is recommended that the checks listed below be followed in the indicated order. … Read more

Odometer Displays Zero or Incorrect Mileage After Programming DTCs U1973 U197E U197F U2A90 U2A91 U1978 and/or U197F – 2020-2022 Buick Cadillac Chevrolet GMC

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Chevrolet Buick GMC Cadillac

NHTSA ID Number: 10202388 Manufacturer Communication Number: PIT5851 Summary This Preliminary information communicates an issues with the odometer being incorrect after a programming event and how the dealership can resolve the issue.   Condition Some dealerships may comment that after a module is replaced and programmed, the odometer may display zero miles or the incorrect mileage. This … Read more