Battery Replacement - Chevrolet 2005 Colorado Owner's Manual

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.
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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.