Question about 1983 GMC S-15 Pickup

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How do you change heater core in 1982 gmc s-15?

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

tripletauto
  • 1450 Answers

SOURCE: 1996 GMC Sonoma heater core

the dash has to come out

Posted on Sep 11, 2008

SOURCE: How do I change out a heater core on a 1997 GMC 1500 Pickup truck

you need to remove the glove box disconect the heater hoses look behind the glove box some heater boxes are two pieces and you can remove the heater half some you need to remove the whole piece if that is the case let a garage do it because they need to disconect the a/c so it needs to be evacuated and recharged if it is a two piece box just remove the bolts that hold the heater core under the dash and pull the box strait back good luck

Posted on Dec 22, 2008

CMV9
  • 594 Answers

SOURCE: changing a heater core

here is a step by step diagram to replace your heater core
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.
  1. Disconnect the negative battery cable.
  2. Drain the engine cooling system into a clean container for reuse.
  3. Disconnect the heater hoses from the heater core.
  4. Remove the instrument panel storage compartment.
  5. Disconnect the electrical connectors, as necessary, that may be in the way.
  6. Remove the center floor air distribution duct.
  7. Remove the hinge pillar trim kick panels.
  8. Remove the blower motor cover screws and the cover.
  9. Remove the blower motor screws and the blower motor.
  10. Remove the steering wheel and the steering column (standard & tilt).
  11. Remove the instrument panel fasteners and pull the instrument panel back far enough to gain access to the heater assembly.
  12. While holding the heater assembly against the firewall, remove the screw located on the interior side near the evaporator pipe, if equipped.
  13. In the engine compartment, remove the 4 heater assembly-to-chassis screws and the 2 heater assembly-to-chassis nuts.

    NOTE Removal of the heater assembly may require the help of an assistant.
  14. Remove the 7 heater cover-to-heater assembly screws and the cover.
  15. Remove the heater core from the heater assembly.
    93113g80.gif View of the front heater assembly—Chevy/GMC C/K-Series, Blazer, Jimmy, Sierra, Suburban, Tahoe, Yukon
    Click to Enlarge
    93113g81.gif Location of the front heater assembly-to-chassis fasteners—Chevy/GMC C/K-Series, Blazer, Jimmy, Sierra, Suburban, Tahoe, Yukon
    Click to Enlarge
To install:
  1. Install the heater core to the heater assembly.
  2. Install the heater cover and the 7 heater cover-to-heater assembly screws.

    NOTE Installation of the heater assembly may require the help of an assistant.
  3. In the engine compartment, install the 4 heater assembly-to-chassis screws and the 2 heater assembly-to-chassis nuts. Torque the screws to 17 inch lbs. (1.9 Nm) and the nuts to 25 inch lbs. (2.8 Nm).
  4. While holding the heater assembly against the firewall, install the screw located on the interior side near the evaporator pipe, if equipped. Torque the screw to 97 inch lbs. (11 Nm).
  5. Install the instrument panel and the instrument panel fasteners.
  6. Install the steering column (standard & tilt) and the steering wheel.
  7. Install the blower motor and the blower motor screws.
  8. Install the blower motor the cover and the cover screws.
  9. Install the hinge pillar trim kick panels.
  10. Install the center floor air distribution duct.
  11. Connect the electrical connectors that were disconnected.
  12. Install the instrument panel storage compartment.
  13. Disconnect the heater hoses to the heater core.
  14. Refill the engine cooling system.
  15. Connect the negative battery cable.
  16. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.

Posted on Apr 16, 2009

  • 462 Answers

SOURCE: How do you get to the heater core in a 98 GMC Jimmy?

THE STEERING COLUMN (DO NOT ROTATE THE STEERING WHEEL AFTER THE INTERMEDIATE SHAFT IS REMOVE, YOU WILL BREAK THE SIR COIL), WINDSHIELD MOLDINGS, AND DASH HAVE TO BE REMOVED FIRST. UNDER THE HOOD THE BLOWER RESISTOR, R/H INNER FENDER WELL, HEATER HOSES TO THE HEATER CORE AND SEVERAL NUTS AND BOLTS HOLDING THE HEATER PLENUM TO THE FIRE WALL INCLUDING THE HIDDEN BOLT UNDER THE BLOWER RESISTOR IN THE EVAPORATOR CORE AREA. THEN FINALLY THE BOLTS ON THE INSIDE OF THE TRUCK HOLDING THE PLENUM TO THE FIREWALL.

NO DISRESPECT INTENDED BUT IF YOUR NOT A TALENTED MECHANIC I WOULD FIND ONE OR HIRE ONE THAT CAN DO THE JOB FOR YOU. THIS IS QUITE INVOLVED FOR A NOVICE.

Posted on Jun 01, 2009

dnewcombe1
  • 1564 Answers

SOURCE: Replacing heater core in 2000 GMC sonoma. Dash is

If the dash is removed you've saved about 9 10ths of the job endurance. Look around, what you believe to be, the perimeter of the heater box. I cannot, and no one else can, tell you exactly where the bolts and nuts that mount the heater box are. Therefore you must viually sixe the box and check outide in the engine compartment and inside under the dash for the mounting bolts.You'll want to start by removing the heater hoses. Then starting at the passenger side engine compartment look for a group of 10mm or 7/16ths nuts retaining the housing and remove them. Do the same inside. The housing is usually held together with screws or clips, it changes year to year. Keep a log or pix of the wires and cables and hoses(vacuum) that are connected to the housing for reassembly. You'll need to "roll" the box out from under the dash depending on how much of the dash has been removed. The core is easy to spot for is has two hoses sticking out, and, is encircled with clips or screws . Also make sure you remove the bracket around the two entry hoses if it has one. Thank you, Dana

Posted on Oct 04, 2009

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1 Answer

How to flush a gmc heater core


Dear Tim
Disconnect the heater hoses from the engine block.
Using some steel or plastic pipe of the right diameter to fit inside the hoses.
Clamp the pipes inside the hoses, and attach a garden hose or a compressed air hose to the pipe to blow the heater core clean. Remember, the normal pressure that the core is designed for is about 15 # per square inch, so either normal household water pressure or an air compressor can blow the core to pieces, so be REALLY gentle whilst blowing it out.
God bless your efforts.

Dec 13, 2016 | GMC Cars & Trucks

1 Answer

How do i change the heater inlet hose on a 1989 gmc s 15 4.3 liter


The design of the inlet hose isn't exactly one of the General's better ideas.

1st, do NOT simply loosen the hose clamp at the heater core fitting next to the firewall and start yanking. THIS will almost guarantee a ruined heater core where the tube is fastened to the core itself. (IF that happens, then you have the "fun" job of replacing the heater core also.)

I usually slit the hose length wise on the fitting then GENTLY peel the hose from the fitting.

The other end of the hose (engine end) is the design I don't care for.

The ones I've done I have simply taken the stock fitting completely off and replaced it with a standard hose fitting like the one shown here; Murray Climate Control Heater Fitting

NOTE; This may NOT be the exact fitting you need but it gives you an idea of what too look for.

After you get the fitting changed out it's a simple matter of installing the hose and tightening the hose clamps. I usually spritz a little WD40 on the inside of the hose ends to make installation easier.

This method is not only cheaper, but it eliminates the goofy fitting that was installed from the factory.

Hope this helps.

Feb 20, 2015 | GMC Cars & Trucks

1 Answer

Heater not working from my 97 GMC jimmy. Change


Do you feel heat on both heater core hoses? If not then it might have a blocked heater core, low coolant level, defective heater control valve or a blend door issue.

Jan 04, 2015 | 1997 GMC Jimmy

1 Answer

Can a bad heater core cause your vehicle to overheat? I have a 1994 GMC Suburban


I WOULD SAY NO BECAUSE WATER ONLY CIRCULATES WHEN YOU TURN ON THE HEATER, BUT IF YOUR VEHICHLE CONTINUES TO OVERHEAT IT COULD BE 5 THINGS. CLOGGED RADIATOR,RADIATER HOSES.THERMOSTAT,RADIATER FAN SENSOR OR THE WATER PUMP

Feb 14, 2013 | 1994 GMC Suburban

1 Answer

Need pic how to change the heater core


you need a Movie for that Lol, anyway by pivoting dash forward you can gain access,look on U Tube

Jan 12, 2013 | 1991 GMC S-15 Jimmy

1 Answer

My 2000 gmc truck is leaking water from the heater and vapor enters the cab through the air vents


your heater core is leaking in to the cab.you need to change the heater core

Sep 07, 2011 | 2000 GMC Sonoma Extended Cab

1 Answer

Heater core replacement 88 s15


This is never an easy job and that is why the labor charges are high for this repair. I know of no place you can get detailed instructions on how to get to the core. You basically remove enough of the dash surround to gain access to the core. Just go slow, take photos or video if necessary to remember how everything fits back in place. If you will search YouTube with the term "heater core replacement 1988 S-15" you may get some help.

May 23, 2011 | 1988 GMC S-15

1 Answer

Is it antifreeze coming out of my rear heater core on my gmc envoy?


The heater core is unservicable which has to be changed out.........And yes it would be antifreeze which passes through your heater core......Hope this helps you out.

Oct 12, 2010 | 2004 GMC Envoy

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