Question about 2003 GMC Sierra 1500
Follow the upper radiator hose to the engine.....Should be right behind the a/c compressor......It's under that housing.
Posted on Mar 17, 2011
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Posted on Jan 02, 2017
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Fig. Thermostat housing - 4.8L, 5.3L and 6.0L engines (clikc image for zoom)
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