GMC 2003 Sierra - Manual (Page 330)

* Pul on eHlra clolhing or wrap a blanket around you. If
you have no blankets or eiiira clothing, make body
msulalors from newspapars, budap bags, rags, floor
mats — anything you can wrapajound yourself or
tuck under your dothlnq lo keep warm.
Snow can trap exhaust gases under your
vehicle. This can cause deadly CO (carbon
monoxide) gas to get inside. CO could
overcome you and kill you. Vou can't see Ft or
smell It, so you might not Know It Is in your
vehicle. Clear away snow from around the
base of your vehlcfCr especially any that ia
blocking your exhaust pipe. And check around
again from time to time to be sure snow
doesn't collect there.
Open a window just a little on the side of the
vehicle that's away from the wind. This will
help keep CO out.
Run your engine only as long as you must. This saves
fuek When you run the engine, make it go a liltle faster
lhan just idle. Thai is, push Ihe accelerator slightly. This
uses less fuel for ihe heal itiat you get and It keeps the
battery charged- You will need a well-charged battery to
restart the vehicle, and possibly Гог signaling! laler on with
your headlamps. Let the heater run for a while.
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