Running Your Engine While You Are Parked; Engine Exhaust - GMC 2003 Sierra 1500 Pickup Owner's Manual

Running Your Engine While You
Are Parked
It's better not to park with the engine running. But if you
ever have to, here are some things to know.
Idling the engine with the climate control
system off could allow dangerous exhaust into
your vehicle. See the earlier Caution under
"Engine Exhaust."
CAUTION: (Continued)
I
Also, idling in a closed-in place can let deadly
carbon monoxide (CO) into your vehicle even if
the fan is at the highest setting. One place this
can happen is a garage. Exhaust
-
with
CO
-
can come in easily. NEVER park in a
garage with the engine running.
Another closed-in place can be a blizzard. See
"Winter Driving" in the Index.
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