Cadillac Lyriq key fob battery
2 of the 4 model years listed for the Cadillac Lyriq have a proven battery. The most common answer is CR2450. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2023-2024Smart key
CR2450
FCC ID YG0G20TB1Two sites agree: bestkeysupply.com and americankeysupply.com (checked Nov 1, 2026)
Find CR2450 on Amazon - 2025-2026Smart key
Not confirmed yet
Changing the battery
Smart key (push-button start)
- Start by freeing the hidden metal key: there is a latch or slide on the case, and the blade comes out once it moves.
- Look inside the empty key slot for a notch. Put the tip of the metal key or a small flat screwdriver wrapped in tape there and twist gently until the shell splits.
- Pop the old battery out with a toothpick or plastic pick, not a metal blade, and seat the new one with the + side matching the old one.
- Snap the halves back together, slide the metal key home, and press each button, then try the start button from the driver's seat.
Cadillac smart remotes commonly hide a key behind a side button. With it out, the case opens at the bottom slot.
A CR2450 is 24.5 mm across and 5.0 mm thick, much fatter than a CR2032. A thinner cell will rattle and lose contact, so buy the exact size.
Coin cells are a choking and burn hazard for children. Store the spares in their original pack, out of reach.