How to Replace the Key Fob Battery in a Cadillac CTS-V

1. Press the thin button near the bottom of the transmitter and pull the key out.
2. Insert a flat, thin object into the slot on the side of the transmitter to separate it.
3. Remove the old battery without using a metal object.
4. Insert the new CR2032 or equivalent battery with the positive side facing down.
5. Snap the transmitter back together.
6. Reinstall the key into the transmitter.

• Do not touch the circuitry on the transmitter; static could damage it.
• Do not pry the transmitter apart through the key slot; this permanently damages it.
• The DIC shows REPLACE BATTERY IN REMOTE KEY when the battery is low.

Source: 2015 Cadillac CTS-V owner's manual, PDF page 32. 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.