just curious if anybody knows if there is or what the difference is in the front sill plates? I was looking in the LMC catalog& they show 3 diff part #'s for the grey colorhttp://www.lmctruck.com/icatalog/cd/full.aspx?Page=52 I understand that there may be a fitment difference between 94- & 95+ as every color has a diff part # w/ a separation in those yr groups. But what about 88-91 vs 92-94? is it shade or style difference? Will say a 91 pc fit function correctly in a 98?