What type of battery does the 2012 Cadillac SRX RKE transmitter use, and how do I replace it?

The RKE transmitter uses a CR2032 or equivalent battery, installed with the positive side facing down. To replace it, press the button near the bottom of the transmitter to remove the key, use the key blade to separate the two halves of the transmitter, and remove the old battery without using a metal object to avoid damaging the circuitry. Snap the transmitter back together after inserting the new battery. (Page 41-42)