How to Replace the Key Fob Battery in a GMC Canyon

1. Press the button on the side of the remote key near the bottom and pull the mechanical key out.
2. Use the mechanical key blade in the slot to remove the battery cover by hand.
3. Pull the tab to lift the seal and reach the battery.
4. Remove the old battery without using a metal object.
5. Insert the new CR2450 Lithium or equivalent battery with the positive side facing up.
6. Set the seal back into the groove around the battery compartment.
7. Snap the battery cover back on and reinsert the mechanical key.

• Replace the battery soon when the Driver Information Center displays REPLACE BATTERY IN REMOTE KEY.
• Do not touch the circuitry on the remote key; static could damage it.
• Reassemble properly so the remote key is sealed against liquids.

Source: 2026 GMC Canyon owner's manual, PDF pages 14, 13. 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.