GMC 2002 Envoy Owner's Manual page 82

To replace the battery in the remote keyless
entry transmitter:
1. Insert a thin coin in the slot between the covers
of the transmitter housing. Gently pry the
transmitter apart.
2. Remove and replace the battery with a three
CR2032 or equivalent battery, positive (+)
side down.
3. Align the covers and snap them together.
4. Check the operation of the transmitter.
Liftgate/Liftglass
CAUTION:
It can be dangerous to drive with the liftgate or
liftglass 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 liftgate or liftglass
open or if electrical wiring or other cable
connections must pass through the seal between
the body and the liftgate or liftglass:
D
Make sure all other windows are shut.
D
Turn the fan on your heating or cooling
system to its highest speed with the setting
on panel or bi
That will force outside air into your vehicle.
See "Comfort Controls" in the Index.
-
D
volt
If you have air outlets on or under the
instrument panel, open them all the way.
See "Engine Exhaust" in the Index.
-
level with recirculation off.
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