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Test Description

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 3)  - Measure the resistance of the wheel speed sensor in order to determine if the sensor has a valid resistance value.
  2. 4)  - Ensures that the wheel speed sensor is generating a valid AC voltage output.
    3. Fig 1: DTC C0221-C0227 Diagnosis
    G01669313Courtesy of GENERAL MOTORS CORP.
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