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Heat is completely out only blowing cold air ! Need to know how to locate heater core and maybe some tips on replacing it ! It's a 2000 gmc jimmy 6cilynder

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Could be as simple as your fuse to the heater is blown. You may not need to locate the heater-core.

Posted on Dec 30, 2012

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Posted on Jan 02, 2017

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SOURCE: 200 gmc jimmy st heater

Had similar problem in my 2000 Jimmy. No hot air from heater. Had the shop (Midas) disconnect heater hoses at the fire wall and blow out the heater core with air hose. Got rust and junk blown out. Hooked up and flushed system with new anti freeze. Got lots of heat now.

Posted on Nov 09, 2008

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SOURCE: i have a 2000 dodge caravan, no heat

Sounds like the air "blend" door might be inoperable. This door opens and closes a specified amount to regulate the amount of either cooled or heated air, as requested by the climate control unit. If the door is continually in the position which is bypassing the heater core (cold setting), the air will not get warm regardless of the condition/operation of the heater core. I'd suggest having this component checked.

Posted on Nov 28, 2008

WarHog
  • 9 Answers

SOURCE: 94 GMC Jimmy heater fan not working

if you hear the fans blowing and no heat is coming
then you mite have to replace the heater.

before you try to replace the heater talk to Lords

Posted on Dec 04, 2008

SOURCE: 2001 gmc jimmy engine warm but heater blows cold air

Disconnect the heater hoses from the water pump and the intake manifold. Get a compressor and blow out the hose (put the air hose into the the hose that came off the mainfold. then flush the system and replace the antifreeze.

Posted on Dec 12, 2008

  • 1 Answer

SOURCE: 96 audi a4 heater blows cold air

you have air in the system!! you have to unbolt the filler tank and lift it 5 inch higer first. then loose the right hose on the heater core( this hose have and hole to bleed the system) and then put antifreeze until the antifreeze will go out of the hole then re install the hose to the heater core, then ajust the level correcty
have fun
jean-martin

Posted on Feb 05, 2009

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3 Answers

My 2000 jimmy has heat problems. the heat goes from cold to hot to warm to cold etc. what could the problem be?


If the temp gauge is now more stable, the problem is in your heater system, not the engine cooling system.

Sep 12, 2014 | 2000 GMC Jimmy

1 Answer

I can't get heat in the cab, 2000 GMC Jimmy S15


well either your heater core lines are clogged ore the heater core is just bad

Jan 30, 2013 | 2000 GMC Jimmy

1 Answer

Locating Heater core on 2000 GMC jimmy


heater core is cloged suggest replacing it or tryin to unclog with compressed air

Jan 03, 2013 | 2000 GMC Jimmy

1 Answer

My 2000 gmc jimmy blow cold air heater


common for this vehicle to have clogged heater core

Dec 16, 2012 | 2000 GMC Jimmy

2 Answers

The heater only blows cold air,the radiator is full,thermastat is working and the engine temp is within normal ranges.


I've had this problem. 2000 GMC uses a closed coolant system. Meaning takes and returns coolant from and to the Reserve Bottle and has little air in the engine and heater systems.
If everything appears ok but no heat. "Air Lock" is the most likely cause. (With interior heater set to full heat) Solution; 1. Make sure water pump works. 2. Drain about 1/2 engine coolant into container. 3 Remove both heater hoses from engine side and flush heater core in both directs through heater hoses with garden hose. 4. Reattach heater hoses in correct locations. 4. Refill engine with coolant. 5 Start engine and run for 2 min., use caution when topping up coolant.
6. Most 2000 GMC have twist off caps with plugs located mid way on heater hoses. with engine cold, start engine these caps may be loosened to allow trapped air to escape. Do not attempt with engine hot due to hot coolant injuries. This may take more than one attempt to remove all air from heat system. 7. Lastly most 2000 GMC water pumps have a bleeder plug,( 3/8" square driver plug) located on the water pump. With egine cold this plug should be removed to remove any air. Reinstall plug with thread sealant.
Hope this helps cheers

Dec 09, 2010 | 2000 GMC Jimmy

2 Answers

We live in a cold climate. Our 1998 GMC Jimmy Heater will not provide cabin heat. The engine warms normally. We replaced the thermostat just to make sure the coolant was warm enough. The blower operates...


UNHOOK BOTH HEATER HOSES AND FLUSH OUT HEATER CORE
DO IT FOWARD AND BACK FLUSH / COVER DIST. CAP OR YOU WILL
FILL IT WITH WATER / IF IT CLEARS OUT HOOK HOSES BACK UP AND
BLEED AIR OUT OF SYSTEM / IF IT DOES'T CLEAR OUT HEATER CORE
WILL NEED TO BE REPLACED (DASH COMES OUT TO DO HEATER CORE)

Dec 08, 2010 | 1998 GMC Jimmy

1 Answer

No heating on jimmy....fans blows cold air only....heater core is fine


Mine did the same thing you need to have heater core flushed out. Dexcool coolant clogs it up get it and the radiator back flushed and changed to regular coolant. This should fix the problem.

Oct 17, 2010 | 2000 GMC Jimmy

1 Answer

Heat not working on 98 gmc jimmy. Replaced thermostat, checked fluids. Blows air but no heat. Have automatic temp controls and when put on auto nothing at all comes through vents but if put back to manual...


Flushing the heater core is fairly easy just remove the 2 hoses going to the heater core and use a different hose if you have to and use a garden hose to backflush the blockage out..this may take as much as 5-6 times also check for vacumn lines missing or disconnected or breaks pinched ect... some where in the vicinity of the passenger side under hood by the a/c lines ect. good luck hope this helps

Dec 06, 2009 | 1998 GMC Jimmy

3 Answers

2000 GMC Heater Problem


I had problems with a similar truck,a 1998 GMC diesel after checking to make sure the control cables were operating the blend door and blowing the mess of the heater core,I replace the thermostats.Still no heat turns out there was a small amount of debris collecting in the fitting for the inlet hose at the thermostat housing after removing it and blowing out the lines the heat was fine.

Nov 19, 2008 | 2000 GMC Jimmy

2 Answers

200 gmc jimmy st heater


Had similar problem in my 2000 Jimmy. No hot air from heater. Had the shop (Midas) disconnect heater hoses at the fire wall and blow out the heater core with air hose. Got rust and junk blown out. Hooked up and flushed system with new anti freeze. Got lots of heat now.

Oct 25, 2008 | 2000 GMC Jimmy

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