Does anyone have the OEM step bars for the Silverado truck? I am interested in these OEM ones and I was wondering how they compare to the Westin Platinum ones. The Westin have a lifetime warranty and I cannot find out how the OEM ones compare in this area. I would like to have the Chevy ones, but not if they are not going to last as long as the Westin ones. If you have them - could you please let me know what you think of them?