2000 GMC Jimmy Logo
j
jimo Posted on Sep 12, 2014
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My 2000 jimmy has heat problems. the heat goes from cold to hot to warm to cold etc. what could the problem be?

I replaced the thermostat because jimmy was blowing nothing but cold air when heat and/or defrosters were turned on. now the truck blows hot then warm then cool(not cold) air then back to hot(but not real hot). What could the problem be?

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Jay Plesset

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  • Posted on Sep 12, 2014
Jay Plesset
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If the temp gauge is now more stable, the problem is in your heater system, not the engine cooling system.

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  • Posted on Feb 03, 2015
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Is engine water temperature normal so that it can open thermostat so water can circulate .if so check your blend doors

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  • Posted on Sep 13, 2014
Jeff Mitchell
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Your heater core is likely clogged up. This is a common problem on older Jimmies.

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