Mechanics

SMOKE COMING OUT OF THE VENTS

2006 Hummer H3

Heater problem
2006 Hummer H3 6 cyl All Wheel Drive Automatic 45,000 miles

WITH HEAT ON OR OFF, WHILE THE TEMP DIAL IS ON HOT, SMOKE COMES OUT OF THE VENTS.
WHAT IS THAT?
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OJB
October 21, 2008.



Sounds like you have a bad heater core and you will have to replace it.

Does it smell like antifreeze and have a oily feel?

Blackop555
Oct 21, 2008.