GMC 2007 Canyon - Manual (Page 103)

Battery Replacement
Under normal use, the battery in your remote
keyless entry transmitter should last about
two years.
You can tell the battery is weak if the transmitter
will not work at the normal range in any location.
If you have to get close to your vehicle before
the transmitter works, it is probably time to
change the battery.
Notice: When replacing the battery, use
care not to touch any of the circuitry.
Static from your body transferred to these
surfaces may damage the transmitter.
To replace the battery, do the following:
1. Insert a thin coin, or similar object, in the slot
between the covers of the transmitter housing.
Gently pry the transmitter apart.
2. Remove and replace the battery with a
three-volt CR2032 or equivalent battery.
3. Align the covers and snap them together.
4. Check the operation of the transmitter.
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