Have a 2005 Silverado 1500 4wd with 17 inch rims. They are OEM rims with OEM center caps. Problem is the plastic lugs that hold the center caps on won't go over the main lug nuts. They worked until three years ago when I had new tires put on. Bought new plastic lugs and still won't grab the threads on the main lugs. Have had several people who are experienced look at the issue. One says my chrome covered rims have expanded where the chrome is plated over the steel rim. Another says it's the main lug threads. Tried one new lug but no change. Everything is OEM so cannot figure it out. Worked for 14 years. Any ideas?