Question about 1987 GMC R1500

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I need to replace the heater core in my 1987 GMC 1500

Are there any instructions out there for removing/installing????

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I would recomend that you buy a Haynes manual at advanced auto or auto zone. For $12 it has alot of good information.

Posted on Mar 09, 2009

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Where is the heater core for GMC Yukon XL 1500 and how to removed for replacing


heater core is under the dash in the same enclosure as the interior fan motor. as to remove/replace, I recommend getting a chilton's manual for your vehicle, they have step by step instructions and specifications.

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Where is the heater core for GMC Yukon XL 1500 and how to removed for replacing


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How to replace heater core GMC Yukon xl 1500


Heater core is under the dash in the same enclosure as the interior fan motor. as to remove/replace, I recommend getting a chilton's manual for your vehicle, they have step by step instructions and specifications. Its a great investment if you want to do things yourself, and if it's too complicated it should give you an idea as to what to expect from a mechanic

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Replace heater core in a 1987 olds delta 88


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Dec 27, 2012 | 1987 Oldsmobile Delta 88

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How do I replace the heater core in my 1987 Chevrolet Custom Deluxe pickup truck?


Inspect/Replace If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing
  • The heater housing is usually under the dash and must be removed to gain access to the heater core.
  • Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.
f74-01.gif The heater housing is disassembled to get to the heater core. Heater Core
  • Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
  • Remove the heater coolant hoses.
  • Remove the cable and/or vacuum control lines (if equipped).
  • Remove the heater core securing brackets and/or clamps.
  • Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
  • To reinstall the heater core, reverse the removal steps.
When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

Dec 15, 2010 | 1987 Chevrolet R10

1 Answer

How do i change the heater core on my 1999 chevy silverado 1500?


Inspect/Replace If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing
  • The heater housing is usually under the dash and must be removed to gain access to the heater core.
  • Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.
f74-01.gif The heater housing is disassembled to get to the heater core. Heater Core
  • Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
  • Remove the heater coolant hoses.
  • Remove the cable and/or vacuum control lines (if equipped).
  • Remove the heater core securing brackets and/or clamps.
  • Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
  • To reinstall the heater core, reverse the removal steps.
When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

Dec 11, 2010 | 1999 Chevrolet Silverado 1500

2 Answers

Flushing the heater core


I removed the hoses and took a air nozzle at low pressure and blew in the return hose connection of the core. A big chunk of paste like substance shot out then pure liquid. I put the hoses back on and tested it. Now its blowing hot!!!!!!!

Apr 10, 2010 | 2000 GMC Sierra

1 Answer

How do i replace the heater core on my 1998 gmc sierra 1500


you gotta remove the dash and the heater core box is on the passenger side behind wear a usual glovebox would be at . you will find it in a black sealed box with your wrapped heated hoses (In&out) easy fix

May 17, 2009 | 1998 GMC Sierra

1 Answer

Heater Core Replacement


try autozone.com to see if they have your car listed for diagrams pictures and step by step instructions if your car is not listed then try your local library they have all the car manuals and even copy them for you and here is a place that sells only GM parts Schram auto and truck parts 1-800-292-1032 if you need it

Mar 13, 2009 | 2003 GMC Sierra

1 Answer

I do I change out a heater core on a 1997 GMC 1500 pick up truck


here is a step by step to replace your heater core. please do not forget to rate and comment about your experience with fixya today
Front
  1. Disconnect the negative battery cable.
  2. Drain the cooling system.
  3. Remove the instrument panel glove compartment.
  4. Tag and unplug all electrical leads as necessary.
  5. Remove the center air distribution duct from the floor.
  6. If necessary, remove the ECM and mounting tray.
  7. Remove the hinge pillar trim panels.
  8. Remove the blower motor cover and then remove the motor.
  9. Remove the steering wheel and tilt back the instrument panel slightly.
  10. Remove the coolant overflow tank. Disengage the heater hoses at the core connections.
  11. Unfasten the attaching screws and nut and then remove the heater case.
  12. Remove the seven screws and lift off the heater case cover.
  13. Remove the fasteners and brackets that hold the heater core to the case and lift the core from the case.
To install:
  1. Install the heater core in the case.
  2. Install the heater case bottom plate. Make sure there is a good seal.
  3. Install the heater case into the truck. Tighten the 4 lower screws to 17 inch lbs. (2 Nm); the upper screw to 97 inch lbs. (11 Nm); and the nuts to 25 inch lbs. (2.8 Nm).
  4. Connect the heater hoses at the core tubes.
  5. Install the coolant overflow tank.
  6. Install the instrument panel and the steering wheel.
  7. Install the blower motor and cover.
  8. Install the trim panels and if removed, the ECM. Install the air distribution duct and reconnect all electrical leads.
  9. Install the glove compartment. Fill the cooling system and connect the battery cable.

Dec 22, 2008 | 1994 Chevrolet C1500

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