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Q: location of pcv and cabin filter need to replace
in the 2003 silverado

on 2003 Chevrolet Silverado 1500

location of pvc and cabin filter
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Pcv valve should be on pass. side valve cover which ever GAS engine you have!
Cabin filter is just left of the blower motor under pass. side dash! There is a small panel that has to be removed to acess filter.
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