Silverado 1500 4WD V8-5.3L VIN B HO (2006)
Step 1 - Step 13
The numbers below refer to the step numbers on the diagnostic table.
3. This step checks for other system DTCs that may affect the PTO.
6. This step tests the PCM for the PTO Enable signal.
7. This step tests the communication between the PCM and the TAC module.
8. This step tests the PTO On Switch Signal circuit.
9. This step tests the PTO On Switch-Signal circuit for an open, high resistance or short to ground.
10. This step tests the Serial Data circuits for an open, high resistance or short to ground.
