Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2000 Buick Century CustomFACTORY OEM SERVICE PROCEDURE
Last Door Closed Locking
NOTE:
If ignition switch is turned to OFF position during Last Door Closed Locking (LDCL) procedure, customization will be terminated and system will remain in most recent mode.
- Sit in driver's seat. Close all vehicle doors. Turn ignition switch to RUN position.
- Depress and hold brake pedal. Depress and hold UNLOCK button on door switch. While holding UNLOCK button, shift transaxle out of PARK, and then back into PARK. To change LDCL mode, shift transaxle out of PARK, and then back into PARK. Chime will sound once when LDCL is disabled and twice when LDCL is enabled.
- To exit and save current mode, release door UNLOCK switch.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.