How to? Heater Core on G.M.

[Jeff H]

My second vehicle is a 92 gmc jimmy. The heater core is leaking and giving me the sauna effect going down the road.

I have a haynes repair manual. They give no pics of what I'm looking for. Instructions are only a few lines.

I'm guessing that its located on passenger side behind the dash down by the floor. Cause thats where I found antifreeze dripping.

How much of a job is it to replace it? Meaning do I have to take apart the dash,radio,etc to repair it?

 

[KBennett]

I did one on an '85 Grand Am once and most of it was done under the dash. I had to remove the console and then the heater ductwork. It had a couple bolts holding it in. I did the one in my '68 GTO and it is all done from the engine side but I had to remove the fender.