Can anyone tell me if the stock step bars on the 2009-2010 silvy's (the 6" oval step bars) will fit on my 2007 new body style Silverado? I know that the aftermarket ones will fit, but the GMtruckparts website lists them for the 2009, but not the 2007. Is this because they wont fit (I thought they were the same platform)? Or is it just because these steps were not originally offered in 2007? Please help, as I really like the look of these massive bars, and am looking at buying a pair if they fit. Thanks!