Like to get some screen shots of some tech manuals to the heater core or this mysterious sensor that the dealer charged us 800 dollars to replace 2 years ago and now its borke again, I do belive the system is vacumme assited because when I shut the truck off I can hear the pneumatics purging.

I get no heat what so ever and the truck does not overheat. Thanks in advance.

 

did you use Search in here for any possible combinations of the issues? Sounds like it could be a vacuum leak.

 

you might be right come to think about a vehicle that had vac assist servos to control heating/ac I cant say what it was because i think the f word is bad hear, but ide still love to have tear-down schematics and procedures so i don't break anything if possible.

I'm new to this site so im not to familiar with the search functions on this forum yet, I also have access to alldataprodotcom but i find thier system to be not so updated & kinda vague and possibly a waste of money.