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Test Description

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 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 in the diagnostic procedure.

  1. 3

    This step tests for excessive resistance in the ECT sensor circuit.

  2. 4

    This step tests for excessive resistance in the IAT sensor circuit.

  3. 8

    This step tests for a skewed sensor through the range of temperatures affecting this DTC.

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