GMC 2006 Sierra - Manual (Page 151)

Engine Exhaust
{ CAUTION:
Engine exhaust can kill. It contains the gas
carbon monoxide (CO), which you cannot 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 were not done correctly.
• Your vehicle or exhaust system had been
modified improperly.
CAUTION: (Continued)
CAUTION: (Continued)
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.
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