How to Replace the Key Fob Battery in a GMC Sierra Denali

1. Pry off and remove the transmitter back cover using a flat, thin object such as a coin.
2. Press the battery and slide it down toward the pocket in the direction of the key ring, without using a metal object.
3. Take out the old battery.
4. Insert the new CR2032 or equivalent battery with the positive side facing up.
5. Push the back cover on, top side first, then the bottom toward the key ring.

• Replace soon when REPLACE BATTERY IN REMOTE KEY shows in the DIC.
• Do not touch the circuitry; static from your body could damage the transmitter.

Source: 2016 GMC Sierra Denali owner's manual, PDF pages 30, 31. 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.