Either by removing the fender liner and going from the bottom, or from the top without removing the fender liner. You may be able to pull out far enough to get at the filter from the bottom without having to remove the clips. I do mine from the top but I've got an 02 so your ac lines may or may not be in the way.
'02 2500HD CC SB 4X4 D/A, Kennedy headlight kit, OilGuard bypass, Nicktane fuel filt, Pred 1.04, Autometer Ultra-Lites, ARE Z-Series, DX-959, KL203, Xferflow filler kit, Kennedy twin lift pump kit, Alpine CDE-HD137BT, JL Audio C2-650X Evolution Series speakers