Passlock(tm) SYSTEM: Notes
WARNING: This page is about a different car, the 1999 GMC Sierra and 1999 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Do not replace Passlock(tm) module unless there are no PCM/VCM DTCs and a current Passlock(tm) module DTC exists after system check and DTC test has been completed. Do not replace Passlock(tm) module based on history codes.
NOTE:
System tests are written specifically for General Motors' Tech 2 scan tool. A generic scan tool may not be capable of performing all necessary test functions.