i bought the valve but am confused as to which hose is the "heater hose" that i am suppose to tap into???

there looks to be two that could be it...... one that is closer to the right side fender that goes to the engine block and another that is closer to the center of the truck that connects to the manifold.... any one know which i should cut into??

would it be the red arrow or the yellow one????

 

Oh golly don't cut into the red hose--that is your air conditioning system, under pressure with refrigerant at all times. Not being a diesel guy, I won't presume to guess which yellow hose you want. Good luck with the valve--somebody will know.

TomB

 

thanks.... already answered that it was the yellow hose