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.
Engine Oil Life Interval Programming
2000 Buick Century CustomSECTION Engine Oil Life Interval Programming
- Engine oil life interval programming must be performed if any of the following have been done:
- Battery voltage was disconnected from PCM before ignition switch was placed in LOCK position for a minimum of 30 seconds.
- EEPROM was reprogrammed.
- Powertrain Control Module (PCM) was replaced.
- Engine oil life interval is calculated by the PCM. The PCM uses many engine parameters to determine the percentage of engine oil life remaining before engine oil should be changed.
- Engine oil life interval may be read by the operator by depressing INFO button on Driver Information Center (DIC). The DIC is located above the stereo. Engine oil life interval will be displayed as a percentage when DIC indicates OIL LIFE LEFT.
- If battery voltage was disconnected from PCM before ignition switch was placed in LOCK position for a minimum of 30 seconds, or PCM was replaced, engine oil life interval must be reprogrammed or reset. Engine oil life interval may be programmed or reset by using a scan tool or the DIC.
- If using scan tool to reprogram or reset engine oil life interval, use scan tool manufacturer's instructions and reprogram or reset engine oil life interval back to the closest original interval index that was recorded on original PCM. Scan tool may reset engine oil life interval index in 10 percent intervals.NOTE: Scan tool may reset engine oil life interval index in 10 percent intervals. The DIC can only reprogram or reset engine oil life interval to 100 percent.
- If using DIC to reprogram or reset engine oil life interval, depress INFO button on DIC. Depress and hold INFO RESET button on DIC until 100 percent OIL LIFE LEFT is displayed on instrument panel. Release all buttons. The DIC can only reprogram or reset engine oil life interval to 100 percent.
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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.