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 on the diagnostic table.

2. This step tests the function of the TFP manual valve position switch.
3. This step tests for a selected gear ratio versus a ratio not obtainable under normal operating conditions.

Fig 1: DTC P0757 (Steps 1 - 3)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC P0757 (Steps 4 - 6)

Courtesy of GENERAL MOTORS CORP.