2003 Chevrolet Astro Owner's Manual - Page 85

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 won't work at the normal range in any location. If you have to get close to your vehicle before the transmitter works, it's probably time to change the battery. To replace the battery, do the following: Notices 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. 1. Insert a thin object like a dime to separate the bottom of the transmitter from the top. 2. Remove the battery and replace it with a new one, making sure the positive (+) side of the battery is facing down. Use one Panasonic@ three-volt, type CR2032, or equivalent battery. 3. Snap the top and bottom together. 2-6