FWIW, a fella by the name of Paul Ferrigno Jr on the other GMC forum found a replacement heater core for. our GMC's. HIs comments can be seen at this
link near the bottom of the page.
https://www.gmcmotorhome.org/threads/the-ferrigno-familys-1975-gmc-glenbrook.342/page-6.
Murray part # 94584
Also available at Amazon
https://www.amazon.com/Spectra-Premium-94584-Heater-Core/dp/B000C7QFCI/ref=sr_1_1?dchild=1&keywords=heater+core+94584.&qid=1621003654&sr=8-1
Looks like it is from 1989-1991 Ford Econlines
https://www.ebay.com/itm/182571358456?chn=ps&norover=1&mkevt=1&mkrid=711-213727-13078-0&mkcid=2&itemid=182571358456&targetid=4581115207302808&device=c&mktype=&googleloc=&poi=&campaignid=410490119&mkgroupid=1240249342282558&rlsatarget=pla-4581115207302808&abcId=9300491&merchantid=51291&msclkid=b8c74c2a37f111892a542cb4b833983d
Seems an exact fit accept for hoses which may have to be manipulated a little.
HTH someone.
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
link near the bottom of the page.
https://www.gmcmotorhome.org/threads/the-ferrigno-familys-1975-gmc-glenbrook.342/page-6.
Murray part # 94584
Also available at Amazon
https://www.amazon.com/Spectra-Premium-94584-Heater-Core/dp/B000C7QFCI/ref=sr_1_1?dchild=1&keywords=heater+core+94584.&qid=1621003654&sr=8-1
Looks like it is from 1989-1991 Ford Econlines
https://www.ebay.com/itm/182571358456?chn=ps&norover=1&mkevt=1&mkrid=711-213727-13078-0&mkcid=2&itemid=182571358456&targetid=4581115207302808&device=c&mktype=&googleloc=&poi=&campaignid=410490119&mkgroupid=1240249342282558&rlsatarget=pla-4581115207302808&abcId=9300491&merchantid=51291&msclkid=b8c74c2a37f111892a542cb4b833983d
Seems an exact fit accept for hoses which may have to be manipulated a little.
HTH someone.
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
