GMC specific DTC OBD2 code: P1523 Electronic Throttle Control Throttle Return
GMC specific DTC OBD2 code: P1524 TP Sensor Learned CI, Throttle Angle Out Of Range
GMC specific DTC OBD2 code: P1525 Throttle Body Service Required
GMC specific DTC OBD2 code: P1526 TP Sensor Learn Not Complete
GMC specific DTC OBD2 code: P1527 Transmission Range/Pressure Switch Comparison
GMC specific DTC OBD2 code: P1528 Governor
GMC specific DTC OBD2 code: P1529 Heated Windshield Request Problem
GMC specific DTC OBD2 code: P1530 Ignition Timing Adjustment Switch Circuit
GMC specific DTC OBD2 code: P1531 A/C Low Side Temerature Sensor Fault
GMC specific DTC OBD2 code: P1532 A/C Evaporator Temperature Sensor Circuit Low Voltage