I hope its one of those two, both i can replace easy and cheap.

 

took the truck to the Autozone. The only codes coming up are for my o2 sensors. how many of those do we have? hehe.

As far as the heater goes its still blowing cold air, i checked all the fuses, radiator fluid..

Sort of at a lose at the moment with this problem.

I dont have the money to just start replacing things that it might be hehe.

hmm

 

do the heater core lines get warm or hot ?

possibly a clogged heater core?

I think your truck has 2 im not sure tho


Edit: Yours has 3



did the code say what bank ?

 

Yeah all the lines get hot.

and thanks for that image!

 

both of them ?

dose the thermostat work ?

no problemo =)

 

Yep, both heat up fine. and judging from the fact that it doesnt over heat at all and the water is circulating perfectly i think the termistat is good. i cant think of any other way to tell other than the truck over heating.

 

your in the right direction

can it be the bend door is stuck on the ac setting ?

 

What is the bend door? haha

 

Its a door inside your dash that opens with the ac is on to let the cold air in

and closes to let the heat work .

I think its located on the passenger side on your truck .
You might wanna do some research on it


Edit: this might help you
https://blazerforum.com/forum/2nd-ge...problem-28141/

 

eww not looking forward to tearing the dash apart if that is needed hahah.

The air def flows from the bottom and top when i turn the ***** but i guess there might be something failing within the dash that closes off the cold air flow.

sigh... hahah