LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1998 >> C3500 HD 6.5 F, Automatic >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Anti-Theft System >> System Testing >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

System Testing: Notes

CAUTION: DO NOT  replace PASSLOCK(R) module unless there are no VCM DTCs and a current PASSLOCK(R) module DTC exists after system check and DTC test has been completed. DO NOT  replace PASSLOCK(R) 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.