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GMC
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2003
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Safari Van Cargo, AWD
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Repair and Diagnosis
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Brakes
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Traction Control
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Antilock Brake System
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Diagnostic Information and Procedures
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DTC C0235 to C0237 or P0609: Rear Wheel Speed Signal Circuit
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Conditions for Setting the DTC
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P1504
Conditions for Setting the DTC: P1504
The PCM detects low voltage on the vehicle speed signal circuit for 45 seconds.