swathdiver
Full Access Member
Does anyone know where the HVAC system actually draws the outside air in from? --What area of the truck.
The cowl of course, passenger side. We don't live in a dusty area on dirt roads with regularity. Changed the first filter out after a year and it was easily good for another year. First was Bosch, send ACDelco, third will be Purolator and all have had charcoal in them. We always do the Pontiac Montanas every other year and they have two.