I have a 1995 Cadillac Seville STS with a Northstar engine. The heater core has been bypassed and I need to know which of the two hoses goes to what fitting on the firewall. To clarify I am working on the passenger side of the engine compartment and have new hoses to replace the old ones. The heater and cooling systems both worked before I took it to a local mechanic. Why he unhooked them is beyond me but I think it has to do with an overheating problem he had been trying to fix.
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1999 Cadillac Seville STS Question: Which heater hose goes to which fitting on the firewall?
Answer #1Greg's Orange Auto (13269 Answers) , Orange, CA - (714) 361-9386globalhelper September 18, 2012, 12:55Master
on the heater core the nipples are slightly diff sizes, so insp that to determine which hose goes where. also be careful not to damage heater core
Replywaxem242, September 20, 2012, 05:57Rookie
Thank you for your response. I got it figured out.