hi, a fellow member suggested i check with you on an impossible, so far, part for my 1990 eldorado touring coupe. it is GM part # 17090215 or ac/ delco 214-123, diverter valve. caddy says it's discontinued and have got the same story from every online parts site. help a brother out if you can. car has only 68,000 miles. i don't know the rules, but if you can't answer me here, you can email me at firstname.lastname@example.org. thanks a lot.