K 1500 Yukon Denali AWD V8-6.0L VIN U (2002)
Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. This step tests for a faulty tow/haul switch.
3. This step tests for voltage input from the BCM to the tow/haul switch.
6. This step tests for voltage through the body wiring harness junction block.
7. This step tests for ground integrity at the splice pack.
