Could be your heater core? Is the burning smell sweet like a syrup?

 

Acrid=electrical, sweet=coolant leak (like he said the heater core), leaves or woody=debris in the plenum, maybe a rat or other vermin built a nest

A start

 

yeah mine was giving off the syrupy smell when i started using my heat a lot more this year, but (im really keeping my fingers crossed) it seems to not be as bad lately and is still getting nice and toasty in my truck after only maybe 10-15min so.... thoughts on that one?

 

Yeah I've had happen to me before in my VW. It isn't that smell. It smells electrical like a resistor, plastic burning, or possibly the blower motor. When on the 3 position of the fan speed, sometimes it works and other times it doesn't. I've seen on here that the resistor pack goes out on these from time to time and was wondering if maybe there is a smell or something that coincides with it. Thanks for you inputs and your ideas.

 

Intermittent electrical operation is likely an about-to-go-bad electrical component (the resistor), an intermittent short-circuit, or a loose/corroded connection, from my experience. i am not an auto tech. Others have posted problems with the BCM ground, good luck.

 

Sounds like it is that resistor pack burning the harness. All the rain we had the last few days is probably messing with it too?

You can check pretty easy with just a 7mm nutdriver. Look down in the passenger footwell for the connector facing straight down with the two 7mm screws next to it. Take those out and check out the resistor. If you need to fix it, be sure you also service the ground pack out in the engine compartment by cleaning it up and improving the ground. There's a how-to on here with pics on replacing the wire harness and resistor pack.