Change heater core in 90 caprice classic - Vehicle Parts & Accessories

Go to library auto section to view mechanics manuals on ur model--wen u take out core-replace blower motor and ac evap at the same time

Not a party at all. If the car has A/C you'd better call in a favor from your friend the mechanic or you'll rip your hair out. If it doesn't have A/C drain the radiator, remove the two heater hoses by slicing ONE INCH back on each, NO MORE than this. Remove the 5 or six 7/16 retaning bolts from the housing on the firewall.In side the car remove the glovebox and hinge. Remove the support bracket that supports the lower cowl housing. Remove the wire harness connectors from the heater box and place a towel on the carpet. You will, wether you like it or not, spill antifreeze inside while rolling the heaterbox out from under the dash. Remove the core from the box and replace. Easy huh? LOL.