Chevrolet 1997 Monte Carlo Owner's Manual page 67

Synchronization
Synchronization may be necessary due to the
security method used by this remote keyless entry
system. The transmitter does not send the same signal
twice to the receiver. The receiver will not respond to
a signal it has previously been sent; this prevents
someone from recording and playing back the signal
from the transmitter.
To resynchronize the transmitter with the receiver, do
the following: While standing close to your vehicle,
simultaneously press and hold the LOCK and UNLOCK
buttons on the transmitter for about five seconds. The
door locks should cycle (lock and unlock) to confirm
synchronization. If the locks
do
not cycle, see your
dealer for service.
Trunk
-
It can be dangerous to drive with the trunk lid
open because carbon monoxide (CO) gas can
come into your vehicle. You can't see or smell
CO. It can cause unconsciousness and even death.
If you must drive with the trunk lid open or if
electrical wiring or other cable connections must
pass through the seal between the body and the
trunk lid:
Make sure all windows are shut.
n r n the fan on your heating or cooling
system to its highest speed with the setting
on VENT. That will force outside air into
your vehicle. See "Comfort Controls'' in
the Index.
instrument panel, open them all the way.
If you have air outlets on or under the
See "Engine Exhaust" in the Index.