How to Replace the Key Fob Battery in a Cadillac LYRIQ

1. Press the button on the side of the remote key near the bottom.
2. Pull the mechanical key out of the remote key without ever pulling it out unless the button is pressed.

• Replace the battery when the Driver Information Center displays REPLACE BATTERY IN KEY.
• The battery is not rechargeable; always use the correct battery type and do not touch the circuitry.
• Follow the reassembly steps so the remote key is sealed properly; the pages provided only show the first step.

Source: 2026 Cadillac LYRIQ owner's manual, PDF page 12. 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.