Chevy Silverado: Anti-Theft Light On, Engine Starts and Stalls – UnderhoodService

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Engine

Chevy Silverado: Anti-Theft Light On, Engine Starts and Stalls

As technicians, we dream that all components can be diagnosed as fast as possible. More complicated faults can take hours to discover, but with some help, you can shorten the overall repair time.

Underhood Service Staff Writers
By Underhood Service Staff Writers
Published:
2000-chevy-silverado

As technicians, we dream that all components can be diagnosed as fast as possible. More complicated faults can take hours to discover, but with some help, you can shorten the overall repair time.

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Vehicle

2000 Chevrolet Silverado 1500, 5.3L

Complaint

The customer states the vehicle starts and stalls. The customer also states the anti-theft light is on.

Cause

Confirmed the customer’s concern and found the vehicle would start and stall. Connected a scan tool and found code B2958 – PassLock Sensor Data Circuit High. Used the scan tool to monitor the PassLock sensor voltage in the body control module while quickly turning the key and found the voltage was outside of the specified range of 0.4-4.9 volts. Performed an inspection of the PassLock sensor wiring harness and found the PassLock sensor wiring harness was damaged under the dash by the steering column.

Correction

Repaired PassLock sensor wiring harness, cleared codes, performed a road test and verified the vehicle operated properly. The anti-theft light did not illuminate and no fault codes returned.

Courtesy of Mitchell1 SureTrack Real Fix

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