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Re: need to replace heater core in my 98' GMC Jimmy
Pretty difficult. With a manual and good weekend you can do this job yourself. I recommend having it done somewhere. Although expensive, its well worth it to have it done. 8-9 hours is about right. You need to remove things like the steering column and entire dash board, heater box and A/C components going into the box. Save yourself the hassle and bite the bullet on this one. You'll be glad you did. Thanks for using Fix Ya!
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Its the same thing except it says GMC on the front. The most common issues with either of them is ABS problems, wheel bearings, ball joints, intake gaskets, plugged heater cores, injector issues, fuel pressure regulators, fuel pumps, catalytic converters, wiper motors, window motors, 4x4 issues, and the list goes on.
If you look under the hood you will see the heater inlet/outlet hoses going through the firewall. The heater core is located on the opposite side of the firewall where those hoses are connected. You can fix this on your own if you have lots of patience and determination. The hard part is just getting to the core. You must remove enough of the dash to allow access to the core. Some parts may just clip on and others are held on with screws. Take photos as you go along so you can remember how to reinstall everything. This is a very labor intensive job and that is why this is an expensive repair if you have someone do it for you. The part is cheap, the labor is not. If you do it, then this is a good time to service the cooling system. Drain, flush, replace thermostat, and fill it up with a 50/50 mix of antifreeze and distilled water. Replace any hose that is suspect. Good luck.
A transmission shop would cast about 1 hour labor plus the parts. Labor cost is around $75.00 an hour here, and the Reman CV joint with the core exchange is around $80.00 and without the core exchange $160.00. Hope this helps.So best i can give you an average $225.00 but call around a reputable transmission shop, since they work on this type of repair all the time. Good luck.
If the heater core is leaking inside the vehicle you're going to need to have it replaced. Once it starts leaking it's only going to get worse. If you are not mechanically inclined I'd suggest you take it to a repair shop to have it done. It's an expensive and labor intensive job.
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.