Question about 2001 GMC Jimmy

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No Heat on my 2001 jimmy

When I move my selector to heat I just get cold are but everything checks out with the thermastat.

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Check the vacuum lines under the hood to vac tank and check valve(older style sys) may have a door motor with built in position sesnor that is faulty or the rod from door motor on drivers side (to right of acc pedal and up 6in) to heat door fallen off

Posted on Oct 04, 2009


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1 Answer

How come i dont get no heat?

The heater core may be plugged with rust. Good way to test it is with the engine warmed up put the controls in heat mode and then go under the hood and locate both water hoses going t the heater core. Hold on to both hoses to see if the temperature of both hoses are the same. If not, no water is getting into the core. . If the temp is the same, then control vacuum is not working. There is a check valve in the line to the control head that prevents vacuum fluctuations from moving the blend door when accelerating. Check it.

Sep 25, 2016 | 2001 Chevrolet S-10

1 Answer

No heat in 2001 dodge stratus,changed Thermostat still blows cold air?

Check the coolant level. If its low you wont get any heat. If its full then I would suspect that the temp. selector on the climate control is faulty. Farley easy to replace. Your local you pull parts yard will have one for $20-$35.

Sep 15, 2014 | 2001 Dodge Stratus

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

1 Answer


look in the engine bay near the fire wall behind the motor u should see 2 about 1inch dia. blach heater hoses about 3-5 inch from eachother those are ur heater core hoses one of which will have a type of box made of plastic with ither wires going into it or a vacume hose going into it on most cars this controld the flow of hot water passing threw the core as u move the heat selector from cold to hot it controls this valve perhaps this is ur problem or u have a jammed thermastat when jamed open it alows too much flow between the motor and the radd never alowing the motor to fully heat up, or ur water pump gone bad (not likely) what is your prestone mix ratio should be 60%prestone-40%water mix also make sure your rad is full a quick way to see if ur water pump is working is when the motor is cold open the radd start the car some prestone will leak out normal-- when the car gets to operating temp the lever will go down cause the thermastate will open alowing water to pass into the motor now slightly rev the motor to about 2000 rpm the level in the radd should drop every time u gass it if not might b a flow problem also if its winter in your location put cardboard infront of the radd maby one 3rd to one half of it. also check under the dash to see if the flaps in the heater /fan box move when u move the selector knobs HOPE THIS HELPD A BIT THANXX!!

Jan 30, 2010 | 2000 Chevrolet Silverado

1 Answer

I have a 2001 ford windstar, and the problem is the heat will be working in the van and then it will blow out cold air, I move the selector from Def/floor to off wait a few minutes and retry it work again,...

1st check your coolant level, if it's low, it will cause exactly what you describe. If the level is ok, post that info here, I'll help further.

Dec 08, 2009 | 2001 Ford Windstar

1 Answer

1993 dodge caravan no heat replace thermastat flushed radiator

You need to flush the heater core or verify that the valve to it is actually moveing with the selector in the dash.

Dec 08, 2009 | 1998 Dodge Caravan

1 Answer

2001 Jimmy. Speakers don't work/ Heat stuck on High

hot cold selector switch bad sound like it needs replaced

Feb 17, 2009 | 2001 GMC Jimmy

2 Answers

2000 Jimmy Blows Cold Air from Heat

check radiator you may have a pin hole

Dec 28, 2008 | 2000 GMC Jimmy

2 Answers


what is the water temp at the dash...leave the rad cap off until normal temp... might be an air lock. If the engine overheats fast and blows coolant out the filler then its a blocked radiator...why did you repace the thermostat

Dec 24, 2008 | 2001 Jeep Cherokee

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