Question about 1994 Chevrolet G20
Do you need to take off dash. where is it located.
It's under the dash in the center. Takes alot of work and requires moving alot of stuff. Go to autozone.com. Register with them. Then look up heater core. It will give you step by step instructions that you can copy or download for help in removing your heater core.
Posted on Jan 19, 2013
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Posted on Jan 02, 2017
under the dash. the dash will have to come out and the steering column will have to be droped down. your local parts store will have a book on your vehicle that will give you detailed instructions to help you
Posted on Dec 16, 2008
When I replaced the heater core on my 95 Suburban, I seem to remember having to disconnect the A/C lines on the firewall for the evaporator. There were also several nuts to remove on the engine firewall side from studs on the heater box that pass thru the firewall. It is definately a lot of work.
Posted on Jan 10, 2009
Things You'll Need:
Draining the Cooling System1Park the vehicle on a level surface. If the engine has been running allow it to cool completely.
Drain the cooling system. Remove the radiator cap from the radiator. Locate the petcock valve on the lower corner of the radiator. Place a waste oil collection pan underneath the petcock valve and turn it counterclockwise to open. Allow the cooling system to drain completely.
Label and remove the heater hoses from the heater core. The heater hoses will connect to the heater core in the engine bay, on the firewall, on the passenger side of the vehicle. Use either the Phillips or the flat-blade screwdriver to loosen the hose clamps that secure the hoses to the heater core. Then pull the hoses off the heater core.
Removing the Heater Core
Remove the heater core cover. Move to inside the passenger compartment. Locate the heater case. It will be bolted to the firewall, below the dash on the passenger side of the vehicle. Use an appropriate sized socket or wrench to remove the five screws that connect the heater core cover to the heater case, and remove the cover.
Remove the steel straps that secure the heater core to the heater case. Unscrew the four screws that connect the steel straps to the heater case using a socket or wrench and remove the straps.
Remove the heater core by pulling it out of the heater case.
Installing the Heater Core
Place the new heater core into position inside the heater case. Be sure to carefully guide the inlet and outlet tubes through the holes in the firewall.
Reinstall the heater core retaining straps, by reinstalling the four screws that secure them.
Place the heater core cover into position over the heater case and reinstall the five screws that secure it.
Refilling the Cooling System
Reconnect the heater hoses to the heater core. Slide the hoses onto the inlet and outlet fittings that extend through the firewall, and tighten the hose clamps.
Close the petcock valve on the lower corner of the radiator by turning it clockwise.
Refill the radiator with a 50/50 mix of antifreeze and water.
Reinstall the radiator cap onto the radiator.
Run the engine and visually inspect for leaks.
Posted on Mar 08, 2011
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