GMC specific DTC OBD2 code: P1418 Secondary Air Injection System Relay A Control Circuit High
GMC specific DTC OBD2 code: P1502 Theft Deterrent System – No Password Received
GMC specific DTC OBD2 code: P1523 Electronic Throttle Control Throttle Return
GMC specific DTC OBD2 code: P1420 Intake Air Low Pressure Switch Circuit Low Voltage
GMC specific DTC OBD2 code: P1503 Theft Deterrent System – Password Incorrect
GMC specific DTC OBD2 code: P1524 TP Sensor Learned CI, Throttle Angle Out Of Range
GMC specific DTC OBD2 code: P1421 Intake Air Low Pressure Switch Circuit High Voltage
GMC specific DTC OBD2 code: P1504 Vehicle Speed Output Circuit
GMC specific DTC OBD2 code: P1525 Throttle Body Service Required
GMC specific DTC OBD2 code: P1423 Intake Air High Pressure Switch Circuit High Voltage