I am trying to replace the thermostat (radiator flush, block sealer) on an 89 GMC Rally Van.
One of the nuts came off just fine, in fact the post came out too. The other side is a different matter. There are some braces holding other parts on the same post. One brace moved out of the way pretty easily once I got the top nut off; it was bracing the oil dipstick tube. The other brace is welded to another part that I haven't identified. I don't think removing the part will work anyway because the brace is welded to some kind of panel that the part itself is bolted to. The panel is welded as well. I've tried prying the brace up off the post but it hardly budges.
Suggestions?
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