Hey Everyone! New to the Forums here and I'd like to say hello. I recently came into possession of a Free 1995 Pontiac Bonneville SE. Only thing I've needed to do with it was the Sub Frame Body Mount on the passenger side and so far an Oil Change. Today, while driving, I noticed the Heater was blowing cold. I decided to flush the coolant and replace the thermostat since the water temp was a bit low on the dash. I flushed the radiator and everything, replaced the thermostat and then ran the car. Heated up to about 200 but still no dice on the heat. I took most of the dash apart and crawled under to look and saw the AC Door was opening to the Blower properly and the vacuum lines appeared to be operating correctly.

I then checked the temp control ****, upon moving it my multimeter would vary on voltage so I assume that is working correctly. The problem I have, I can not find the heater core up in the dash to replace it! I am hoping it is the problem, I also can not find the Blend door to see if that is the issue! I've looked all over the internet and even resorted to ALL DATA! All Data just shows me where the hoses I was hoping someone had a guide with pictures on how to do this. I found the guide Danthurs posted on how to clean the Evap Core but that doesn't seem to be the problem. I'm hoping that I can get to the heater core from the Engine Compartment side of the firewall instead of Dis assembling the entire dash like I've done once in a Taurus, that was a pain!

Thanks for all the help and guides if you have any. You guys are clearly experts on this car so I'm anticipating a response!

Help Anyone?

Does this help any https://www.gmforum.com/t279226/

That does help a lot! Thanks. I was dreading taking the dash off, but its getting colder and colder everyday so It needs to be done I suppose! Thanks.