The heater core is contained within the heater/air assembly. The assembly is divided by the firewall. Now if only the heater core is being removed there is no need to evacuate the refrigerant from from the air conditioning system or remove the blower motor/evaporator housing.
Disconnect the negative battery cable.
Drain the cooling system.
Disconnet the heater hoses at the firewall.
Remove the glove box and the sound insulator panel below the right side of the dash. ( To remove he glove box there should be two screws underneath , you simply unscrew them and detach the glove box from the instrument panel), and of course instsallation is reverse .
Disconnect the the rod from the programmer to the blend air door by squeezing the plastic connector and pulling it out of the arm.
Disconnect the vaccuum and electrical connectors from the programmer just to the right of the heater core housing
Remove the two heater core cover mounting screws and pull the heater core cover (with programmer still attached) away from the heater housing
Remove the two core mounting screws and carefully lower the heater/air condition assembly from under the dash.
Caution : Have some old rags handy to protect the carpet from any spills of coolant .
Installation is the reverse of removal. Note: Make sure to transfer any weather stripping/sealing material from the old core or cover to the new one.
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The 1990 Cadillac Sedan DeVille is front wheel drive. The 1990 Cadillac Sedan DeVille is front wheel drive. The 1990 Cadillac Sedan DeVille is front wheel drive.
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Fuel tank must be removed.
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Cadillac stopped making the Coupe DeVille after 1993.
under passenger dash
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Ok, replace it. Located on the frame rail of the car.
e.g. heater core clogged is a common one - flush or replace it
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unfortunately yes you do. j to the izzo
AnswerDepends whats broken ie. blows cold, no blower at all ???????no blower at all
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P205/70/R15 - Current owner of 1989 Cadillac Sedan Deville & Tires Plus General Service Technician
In my 83 cadillac sedan deville it up by the break petal next to the firewall.