Hummer 2004 H2 Owner's Manual page 93

Liftgate
CAUTION:
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It can be dangerous to drive with the liftgate
open because carbon monoxide (CO) gas can
come into your vehicle. You can not see or
smell CO. It can cause unconsciousness and
even death. If you must drive with the liftgate
open or if electrical wiring or other cable
connections must pass through the seal
between the body and the liftgate:
•
Make sure all other windows are shut.
•
Turn the fan on your heating or cooling
system to its highest speed and select the
control setting that will force outside air
into your vehicle. See Automatic Climate
Control System on page 3-19.
•
If you have air outlets on or under the
instrument panel, open them all the way.
See Engine Exhaust on page 2-33.
To unlock the liftgate, press the unlock button on any of
the power door lock switches or the remote keyless
entry transmitter.
Open the liftgate by pulling the handle located in the
center of the door.
To lock the liftgate, press the lock button on any of the
power door lock switches or the remote keyless
entry transmitter.
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