Cadillac 2007 - Manual (Page 97)

To replace the battery in this type of RKE
transmitter do the following:
1. Use a flat object with a thin edge into the
notch, located below the vehicle locator/panic
alarm button, and separate the bottom half
from the top half of the transmitter.
2. Remove the old battery, but do not use a
metal object to do this.
3. Slide the new battery into the transmitter with
the positive side of the battery facing down.
Use a type CR2032 battery, or equivalent type.
4. Snap the front and the back of the transmitter
together. Make sure the cover is on tightly, so
water will not get in.
5. Test the operation of the transmitter with the
vehicle.
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