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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System >> Diagnostic Information and Procedures >> DTC C0235 to C0237 or P0609: Rear Wheel Speed Signal Circuit >> Test Description

Test Description

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

  1. 3. This step tests for a voltage signal from the PCM.
  2. 4. This step tests for a missing or erratic vehicle speed signal from the PCM. An assistant may be required in order to perform this test.
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