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Old 09-16-2000, 05:29 PM
mycave mycave is offline
LawnSite Member
Join Date: Jan 2000
Location: springfield il
Posts: 34
My heater core has started to leak, been looking at a chiltons book cant tell how hard it will be. Can anyone tell me how hard it is 1986 GMC 4x4 350 3/4 ton with a/c?
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Old 09-16-2000, 10:24 PM
Bungy Bungy is offline
LawnSite Member
Join Date: Sep 2000
Location: MN
Posts: 16
I replaced the heater core in my 85 fullsize blazer. It had a 305 w/ac. I would think they are the same. Mine came out from interior side. I first tried to take it out from engine side (I had no manual to follow) I ended up breaking the heater cover. Just remove the heater hoses and remove the nuts holding the heater core cover on the interior side and mine just fell out. Hope this helps, Bungy
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