# 2000 GMC Jimmy

**URL:** <https://community.cartalk.com/t/2000-gmc-jimmy/20025>\
**Category:** Maintenance/Repairs\
**Created:** [September 26, 2008, 2:26pm UTC](https://community.cartalk.com/t/2000-gmc-jimmy/20025 "2008-09-26T14:26:06Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![melissamw](https://avatars.discourse-cdn.com/v4/letter/m/8baadc/32.png) [@melissamw](https://community.cartalk.com/u/melissamw)\
**Post date:** [September 26, 2008, 2:26pm UTC](https://community.cartalk.com/t/2000-gmc-jimmy/20025/1 "2008-09-26T14:26:06Z")

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I have a 2000 GMC Jimmy 4x4. The heater blows out cold air all the time. I have checked the coolant its fine, replaced the thermostat and still nothing. The engine heats up just fine no overheating or anything and I don’t smell any coolant. any suggestions?

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**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\
**Post date:** [September 26, 2008, 5:30pm UTC](https://community.cartalk.com/t/2000-gmc-jimmy/20025/2 "2008-09-26T17:30:32Z")

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Perhaps your blend door isn’t functioning.

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**Author:** ![Joseph\_E\_Meehan](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/joseph_e_meehan/32/21_2.png) [@Joseph\_E\_Meehan](https://community.cartalk.com/u/Joseph_E_Meehan)\
**Post date:** [September 26, 2008, 5:32pm UTC](https://community.cartalk.com/t/2000-gmc-jimmy/20025/3 "2008-09-26T17:32:32Z")

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Blend doors may be operated by cable, or vacuum, and I believe some of the fancy ones may use electric motors.

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**Author:** ![rayboos](https://avatars.discourse-cdn.com/v4/letter/r/7bcc69/32.png) [@rayboos](https://community.cartalk.com/u/rayboos)\
**Post date:** [September 26, 2008, 10:29pm UTC](https://community.cartalk.com/t/2000-gmc-jimmy/20025/4 "2008-09-26T22:29:35Z")

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if you check the vend door and its ok then make sure the heater core,or heater hoses are not blocked.take off one end and flush it with a garden hose.make sure engine is cold ,or water is hot…also when i change the thermostat i always boil it.if you put it into boiling water it should open.it should be a 180 or 190.in my time i can’t even count all the bad ones i bought brand new that were bad…

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**Author:** ![Beadsandbeads](https://avatars.discourse-cdn.com/v4/letter/b/c57346/32.png) [@Beadsandbeads](https://community.cartalk.com/u/Beadsandbeads)\
**Post date:** [September 26, 2008, 11:28pm UTC](https://community.cartalk.com/t/2000-gmc-jimmy/20025/5 "2008-09-26T23:28:40Z")

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Is the temp of both the heater hoses the same after the engine is warmed up?

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**Author:** ![melissamw](https://avatars.discourse-cdn.com/v4/letter/m/8baadc/32.png) [@melissamw](https://community.cartalk.com/u/melissamw)\
**Post date:** [September 29, 2008, 3:31pm UTC](https://community.cartalk.com/t/2000-gmc-jimmy/20025/6 "2008-09-29T15:31:44Z")

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Would the blend door be behind the glove box in this year too? and if so where would I find it exactly… what does it look like??