It also smelled really bad and was leaking fluid on the passenger side, not alot, but enough to notice. We're wondering if this is the heater core. I've been told that if it was the heater core it would have been leaking fluid into the truck on the passenger side, which didn't happen.
Our 2001 Dodge Ram 1500 truck started smoking through the vent on the passenger on 2001 Dodge Ram 1500
if it smelled sweet its coolant and the heater core is leaking.