GMC XT5 2023 Owner's Manual page 19

18 Keys, Doors, and Windows
1. Press the button on the
side of the remote key
near the bottom and pull
the key out. Never pull the
key out without pressing
the button.
2. Separate the two halves of
the remote key using a flat
tool inserted into the
bottom center of the
remote key. Do not use the
key slot.
3. Remove the old battery.
Do not use a metal object.
4. Insert the new battery on
the back housing, positive
side facing down. Replace
with a CR2032 or
equivalent battery.
5. Ensure that the silicone
mat is correctly positioned
with no gaps or wrinkles.
6. Set remote key button side
down on a hard surface
and press the other half
straight down to force the
halves together.
7. Reinsert the key.