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1990 Chevrolet G Series Van (G20) Question: how do i replace heater core



Visitor, 5.0L V8, Burkesville, KY, March 17, 2011, 06:29

heatert core is leaking

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  • Answer #1

    March 17, 2011, 08:48

    You can find great repair manuals with step-by-step instructions, diagrams, parts locations and other important information here:
    Or here:


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  • Answer #2

    April 25, 2012, 15:40

    drain coolant,disconnect the 2 hoses to core on engine side of firewall,inside you will have to unscrew majority of the passenger side of dash and prop out with a piece of wood etc. to access core and open up heater box.remove screws to core. remember how you get core out of box and will have to play with all those lines etc. that get in your way,etc. good to have a 2nd person to help guide from opposite side of firewall. took me 4 hours in a freezing garage. good luck!!

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