Question about 1999 GMC Sierra

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Where is the thermostat on a 2001 gmc sierra 1500 5.3l

Looking for the thermostat?

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Follow the top radiator hose towrds the motor. you'll see a hose clamp then on the otherside of that is the thermostat housing. there's two bolts holding it on. remove that and any other little brackets that are in your way and it's right there under that housing. Drain a few gallons out of your cooling system, remove housing, and pop old thermostat out. Clean the block and housing with some emery cloth, like $0.40 at auto parts store. (Note, that might not be needed if it's an o ring instead of a gasket. People at store can tell you for sure.) Once it's shiney, place new thermostat it put on new gasket and reinstall. If o ring, place o ring on thermostat and reinstall. top of cooling system, start truck, and keep topping off fluid till it's blowing good heat and not overheating.

Posted on Jan 02, 2009

  • loulouump Nov 12, 2010

    I need a picture of it


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Follow the top radiator hose to the engine block and where it meets you have to take that off and the thermostat is inside. here is how.,2561703/initialAction,repairGuide/shopping/repairGuide.htm?pageId=0900c152801cac3b

Posted on Jan 02, 2009

  • loulouump Nov 12, 2010

    the link is broke


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Follow the LOWER radiator hose from radiator to engine block. Where the hose clamp is that is the housing that holds the thermostat.

Posted on Mar 02, 2013

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Posted on Jan 02, 2017

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SOURCE: octane grade for a 2001 v6 gmc sierra 1500

93 but any will work

Posted on Mar 22, 2009

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SOURCE: Emergency brake actuator for 2001 GMC Sierra 1500

they used those on the full sized trucks and suv's so you might want to try a salvage yard..

Posted on Jan 22, 2009

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SOURCE: replaceing fuel pump on gmc sierra

The fuel pump is located INSIDE the gas tank and is a combination fuel pump/sending unit for the fuel gauge. Be prepared for a large repair bill. About $600!

Posted on Jun 08, 2010

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