Chevrolet 1999 Lumina Owner's Manual page 68

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.
2-8
To replace the battery:
1. Insert a flat object like a dime into the slot on the
back of the transmitter. Gently pry apart the front
and back.
2. Remove the old battery and replace it with the new
one, making sure the positive (+) side of the battery
is facing down. Do not use a metal object to remove
the old battery. (Use type CR2032 or an equivalent.)
3. Snap the top and bottom together, making sure the
halves are together tightly so water won't get in.
4. Test the operation of the transmitter with your
vehicle. If the transmitter does not work, try
resynchronizing the transmitter. (See
"Resynchronization" following.)
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