General Motors GM specific DTC OBD2 code: P1638 Generator F-Terminal Circuit
General Motors GM specific DTC OBD2 code: P1637 Generator L-Terminal Circuit
General Motors GM specific DTC OBD2 code: P1636 PCM Stack Overrun
General Motors GM specific DTC OBD2 code: P1635 5 Volt Reference 1 Circuit
General Motors GM specific DTC OBD2 code: P1634 Ignition 1 Power Circuit Low Voltage
General Motors GM specific DTC OBD2 code: P1633 Ignition Supply Power Circuit Low Voltage
General Motors GM specific DTC OBD2 code: P1632 Theft Deterrent System-Fuel Disabled
General Motors GM specific DTC OBD2 code: P1631 Theft Deterrent Start Enable Signal Not Correct
General Motors GM specific DTC OBD2 code: P1630 Theft Deterrent Learn Mode Active
General Motors GM specific DTC OBD2 code: P1629 Theft Deterrent System-Cranking Signal