One thing I wanted to point out to all as I came across this: Double check the the part you intended to order based on the year of your vehicle against the OEM part# - I say this because while I have a 2003 Silverado LS 1500 Ext Cab 4WD w/5.3L V8 (Type T), the OEM part# for the cabin filter crossreferences to a 2002 Silverado. I actually talked to Hastings and they told me since I purchased my truck in Oct-2002, yes it was a 2003 model, but it still used some 2002 components. I discovered this only because the cabin filter for a 2003 was a single filter while the 2002 was a 2-piece kit - had I not double checked against the OEM part# in my owner's manual, I would have purchased the wrong part. Hastings said GM/Chevy probably made the change to the trucks actually manufactured in 2003.