Originally Posted by scorpion66772

Ok.. Looked but dont see a post about about the first problem you listed. I have the problem with the heater vent selection that cuts out or to def. under load, up hill or under acceleration.. Ive checked all the vacuum lines several times as well as check valve and related hardware under the hood. I have looked in cab but not as hard. Any suggestions would be greatly appreciated. It isnt a priority fix just an annoying one.