DIAGNOSTIC TROUBLE CODES (DTCs): Notes

NOTE: DTC tests are written specifically for General Motors' Tech 1 scan tool. A generic scan tool may not be capable of performing all necessary test functions.

NOTE: All codes except DTCs 1601 and 1629 are IPC trouble codes. DTCs 1601 and 1629 are PCM trouble codes.

NOTE: All voltage measurements using DVOM are made at IPC side of PASSLOCK(R) lock cylinder connector.