Buick 1994 Roadmaster Owner's Manual page 75

Battery Replacement
Under normal use, the batteries in your key chain
transmitter should last about two years.
You can tell the batteries are 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 batteries.
For battery replacement,
use two Duracell@
batteries, type DL-2016, or
a similar type.
To
replace the batteries:
1.
I f
your transmitter
has a screw, remove
the screw from the
back cover. If there
is no screw,
carefully pry off the
cover by inserting a
dime (or similar
object) in the slot
between the covers
and twist.
2. Lift off the front cover, bottom half first.
3. Remove and replace the batteries. Put them in as the
direction under the batteries indicate.
4. Replace the front cover. Make sure the cover is on
tightly, so water won't get in. Replace the screw in
the back cover, if there is one.
If there is no screw,
snap together.
5, Check the operation of the transmitter.
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