GMC specific DTC OBD2 code: P1527 Transmission Range/Pressure Switch Comparison
GMC specific DTC OBD2 code: P1526 TP Sensor Learn Not Complete
GMC specific DTC OBD2 code: P1525 Throttle Body Service Required
GMC specific DTC OBD2 code: P1524 TP Sensor Learned CI, Throttle Angle Out Of Range
GMC specific DTC OBD2 code: P1523 Electronic Throttle Control Throttle Return
GMC specific DTC OBD2 code: P1522 Park/Neutral To Drive/Reverse At High RPM
GMC specific DTC OBD2 code: P1521 Transmission Engaged At High Throttle Angle
GMC specific DTC OBD2 code: P1520 Gear Indicator System
GMC specific DTC OBD2 code: P1519 Electronic Throttle Module Low Volts Communication Disable
GMC specific DTC OBD2 code: P1518 Throttle Actuator Control (TAC) Module Serial Data Circuit