Just open up the tank from the fuel pump access point . Tilt the bed and look down at the fuel tank the opening just unscrews like a gas cap but it’s pretty tight will need a big channel locks or oil filter wrench to Lossen it.
You sometimes have to close the lower vents to blow more air out the defrost side make sure you get the ones that blow on your feet also for maximum effect. Also order can ams winter kit that covers the radiator.
Can you post a picture of where the front mount attaches to the frame. I would like to know how far back it is or if it hangs down and what bolts does it bolt up too.