67 GMC

Look for simple things first. I had the cable from the temperature slide come off the damper for the heater. I had "no heat", cold air blowing etc because the little door wouldn't open with the heat slid to red. All winter I haven't had a chance to find the right clip to hold the cable on the door linkage so I've had it on 100% heat for the whole winter. That's worked out so far this year up here.

JackJare9455

I have noticed the "No heat" threads start to dwindle... Already took my XJ into the shop to have the ac serviced.. went ahead and got that out of the way..

I dont do AC... long story of failure..

BigDaveA82

AC what's that? Lol. I got it but I'm not I'm not paying to fix it to make it work I got windows and they all work so I'm good. :-)

DFlintstone

Sheez. OEM TECK is the forum. There ARE options to "Chat". (with your thumbs".

(we back-flush heater cores). (back and forth) Not so difficult if you can find two two hoses ruining into your cab. (yea, the air blowing matters)

"for some reason my heat blow worm but not that warm like a few degrees warmer then outside worm" From that it might be guessed that it is indeed blowing.

Ether go cold, back-flush and go warmer, or change it out. LISTEN TO 67 GMC.