Pontiac 2004 Grand Prix - Manual (Page 70)

Battery Replacement
Under normal use, the battery in your remote keyless
entry transmitter should last about three years.
You can tell the battery is weak if the transmitter won’t
work at the normal range. If you have to get close
to your vehicle before the transmitter works, it’s 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 flat object like a thin coin into the notch
located on the front of the transmitter, below the
open trunk button, and pry it apart.
2. Gently slide the battery out of the transmitter.
Do not use a metal object to remove the battery.
3. Slide the new battery into the transmitter. Use a
type CR2032 battery, or equivalent type.
4. Snap the transmitter back together, making sure the
halves are secured tightly, so water will not get in.
5. Test the operation of the transmitter with the
vehicle. If the transmitter does not work,
resynchronize the transmitter.
Resynchronization
If the functions on the remote keyless entry transmitter
do not work, or, if only the remote alarm works, after
the battery is replaced, then the transmitter needs to be
resynchronized to the receiver. Do this by pressing
and holding the LOCK and UNLOCK buttons on
the transmitter at the same time for about eight seconds.
You must be within range of the vehicle.
Once the transmitter has been resynchronized, the
horn will sound and the exterior lamps will flash once.
The system should now operate properly.
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