Test Description
WARNING: This page is about a different car, the 2003 GMC Yukon XL, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. 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.
- 4. This step tests the function of the 1-2 SS valve and the internal wiring harness.
- 5. This step tests the power to the 1-2 SS valve from the ignition.
- 6. This step tests the ability of the PCM and the wiring to control the ground circuit.
- 8. This step measures the resistance of the automatic transmission wiring harness assembly and the 1-2 SS valve.