How to Reset the Oil Life on a Cadillac ATS

1. Use the DIC controls on the right side of the steering wheel to display REMAINING OIL LIFE.
2. Press SEL on the DIC controls and hold it down for a few seconds.
3. Check that the CHANGE ENGINE OIL SOON message clears and the oil life shows 100%.

• Reset only right after an oil change; resetting by accident means the oil must be changed at 5 000 km (3,000 mi) since the last change.
• A second method: with REMAINING OIL LIFE displayed, fully press and release the accelerator pedal three times within five seconds.

Source: 2019 Cadillac ATS owner's manual, PDF page 255. Steps are summarized in our own words (AI-assisted, checked against the cited pages 2026-10-18). Other model years can differ; your manual has the final word.