1993 Olds Regency Elite Heater Core

Replacing a heater core on that Oldsmobile is an hour job. And the clamps on the firewall are the hardest part. Remove the screws from the underdash sound baffle on the passenger side and pull the baffle down. Look straight up and there should be several screws holding a small panel door together. Remove the panel and the heater core will be right there. After you've removed the clamps at the firewall and removed the screws to the heater core it should slip right out.