Where is the heater inlet hose located on a 1992 GMC Sierra 5.7 liter truck?
I Don't Know Sorry
Disconnect the inlet and outlet hose going to the heater core, and connect them together. Do not plug either hose, just simply connect them together. Go to an auto parts store and tell them what you want to do. They can supply the proper connector and clamps. The inlet and outlet hoses are located, passenger side, entering the firewall.
Disconnect the negative battery cable and drain the cooling system. Disconnect the heater hoses from the heater core inlet and outlet connections in the engine compartment. Allowing residual coolant from the heater core to drain. Cap the openings. Working inside the vehicle, remove the lower instrument panel sound insulator. Remove the heater floor outlet duct screws or clips and remove the duct. Remove the heater core cover by removing the attaching screws and clips. Remove…