Repair and Diagnosis: Service and Repair

The following are instruction for the repairs:
- Circuit protection.
- Typical electrical repairs.
- Splicing copper wire,
- Splicing twisted/ shielded cable.
- Repairing connectors (except Weather Pack)
- Repairing Weather Pack (environmental) connectors.
- Terminal repair.
- Diode replacement.
- Heated Oxygen Sensor (HO2S) repair.
- OBD II circuit repair.
- GMSPO service parts ordering.

After any electrical repair is made, always test the circuit by operating the devices in the circuit This confirms not only that the repair is correct but, also, that it was the cause of the complaint.

Repair of circuits which are part of the OBD II (On-Board Diagnostics II) emissions control system have several special requirements which must be followed to ensure proper system operation.