GMC Envoy 2003 - Engine Exhaust; Running Your Engine While You Are Parked

Engine Exhaust
{CAUTION:
Engine exhaust can kill. It contains the gas
carbon monoxide (CO), which you can’t see or
smell. It can cause unconsciousness and death.
You might have exhaust coming in if:
• Your exhaust system sounds strange or
different.
• Your vehicle gets rusty underneath.
• Your vehicle was damaged in a collision.
• Your vehicle was damaged when driving
over high points on the road or over road
debris.
• Repairs weren’t done correctly.
• Your vehicle or exhaust system had been
modified improperly.
If you ever suspect exhaust is coming into your
vehicle:
• Drive it only with all the windows down to
blow out any CO; and
• Have your vehicle fixed immediately.
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.
{CAUTION:
Idling the engine with the climate control
system off could allow dangerous exhaust into
your vehicle. See the earlier Caution under
“Engine Exhaust.”
Also, idling in a closed-in place can let deadly
carbon monoxide (CO) into your vehicle even if
the climate control 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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