Question about 2005 GMC Sierra 2500HD 4WD

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I have a 2005 chevy duramax that does not heat up properly. In cooler weather , it takes 10-15 minutes to get the heater to work. I want to change the thermostat, but I.m not sure where it is located. I assume its where the radiator hose connects on top of the motor, but would like an rexploded view before i start unscrewing things. Any help would be appreciated. Tom K

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Look at the top hose were it joins the engine block there are two or three bolts holding on the hose fitting, undo the bolts and the thermostat is under this,, you will need a new gasket as well ,,,dont forget to remove all trases of the old gasket before you fit the new gasket on, and dont over tighten the bolts or hose clip,, top up the rad and run the motor for 5 minuets you may also need to bleed the air out the cooling water so just run the motor for 5 minuets first then top up the rad again,, its not a hard job to do and it will save you paying the workshop

Posted on Nov 12, 2009

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