How to Reset the Oil Life on a Cadillac CT4

1. Use the DIC buttons to display REMAINING OIL LIFE on the Driver Information Center.
2. Press and hold the thumbwheel on the steering wheel.
3. When the confirmation message appears, select YES.
4. Check that the oil life now reads 100%.

• Reset only right after an oil change, since it cannot be reset accurately until the next oil change.
• Alternative: with REMAINING OIL LIFE displayed, fully press and release the accelerator pedal three times within five seconds.
• If CHANGE ENGINE OIL SOON returns at startup, the system was not reset; repeat the procedure.

Source: 2026 Cadillac CT4 owner's manual, PDF pages 296, 297. 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.