With all due respect, if you don't know where the heater core is, you don't want to go after it yourself. It's located in the heaterbox under the dash. It is a 5 hour job if your god like, average tech 8-10 hours, a d-i-y has it towed to a shop in pieces and pays double what it would have cost to just take it there to begin with.
Try changing the cabin air filter and hope it blocked up first. It is behind the glove, Let me see what I find out tommorrow and i'll update it
Thursday, February 1st, 2007 AT 5:04 PM