C 1500 Truck 2WD V8-5.3L VIN T (1999)
![background image](/gmc/c_1500_truck_2wd/v8-5.3l_vin_t/Page-460003.png)
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.