Cadillac XT5 key fob battery
9 of the 10 model years listed for the Cadillac XT5 have a proven battery. The most common answer is CR2032. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2017-2020Smart key
CR2032
FCC ID HYQ2EBTwo sites agree: uhs-hardware.com and energizer.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2020-2024Smart key
CR2032
FCC ID HYQ2ESTwo sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2025Smart key
CR2032
FCC ID HYQ2ESTwo sites agree: bestkeysupply.com and americankeysupply.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 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.
- Use the slot where the metal key sat. Twist, do not lever hard, and work along the seam until the halves separate.
- 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 CR2032 is 20 mm across and 3.2 mm thick. CR2032, CR2025 and CR2016 share the same width but not the same thickness, so a swap between them can leave a loose contact or a case that will not close.
Keep spare coin cells away from small children. A swallowed coin cell can burn the throat within hours; if it happens, go to an emergency room at once.