Chevrolet 1994 Lumina Owner's Manual page 126

Your Driving and the Road
If You're Caught in a
Blizzard
(CONI)
...
124
Run your engine only as long as you
must. This saves fuel. When you run the
engine, make it go a little faster than just
idle. That is, push the accelerator slightly.
This uses less fuel for the heat that you
get and it keeps the battery charged. You
will need a well-charged battery to restart
the vehicle, and possibly for signaling
later on with your headlights. Let the
heater run for awhile.
Then, shut the engine off and close the
window almost all the way to preserve the
heat. Start the engine again and repeat this
only when you feel really uncomfortable
from the cold. But
do
it as little as
possible. Preserve the fuel as long as you
can. To help keep warm, you can get out
of the vehicle and do some fairly vigorous
exercises every half hour or so until help
comes.
Towing a Trailer
NOTICE:
Pulling a trailer improperly can
damage your vehicle and result in
costly repairs not covered by your
warranty. To pull a trailer correctly,
follow the advice in this section, and
see your Chevrolet dealer for
important information about towing
a trailer with your vehicle.