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How do I replace the heater core in a Chevy express 1500
The heater core in a 1987 Chevy Celebrity is in the heater plenum to the right of the hump and below the glove compartment.
You can find heater vacuum line diagrams for your Chevy van in most Chevrolet service manuals. The service manuals can be found at your local library.
The heater blend door is not run by vacuum. It is run by an electric actuator.
The heater control valve is mounted on the engine side of the heater and evaporator box which is located on the passenger side of the engine compartment. It will have at least three hoses connected to it and one vacuum line. It kind of hides underneath the a/c accumulator.
Where does the vacuum line lead to from the top of an 2002 Chevy express 1500 van with 5 liter engine
The heater core on a 1985 Chevy Suburban is located under the dashboard on the passenger side of the vehicle. The glove compartment may have to be removed to access the heater core.
Disassemble the dash, open up the HVAC compartment.
if im not mistaken the heater control has vacuum lines. take off heater controls and see if you have a bad vacuum line to heater box.
You would find the HVAC vacuum line routing in a shop manual for that vehicle.
If you are asking about the heater blower motor it is mounted to the heater ducting in the engine compartment on the passenger side.
Disassemble the dash and open up the HVAC compartment.