Question about 2001 GMC Sierra 2500HD
Who told you this??????? There is only one Thermostat in your Truck. Follow the Upper Radiator Hose to the Motor. Remove the Housing that the Hose is Connected to and the Thermostat is Under the Bell Housing.
Posted on Jan 10, 2009
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Posted on Jan 02, 2017
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Fig. Air bleed valve (1) and thermostat housing (2) 2.7L-engine
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