As far as exterior changes go, 04 and 05 XLT Premium and Adrenalin models came in monochromatic exterior paint (i.e. color-matched lower molding and bumpers). Furthermore, 04 and 05 Adrenalins came with chrome wheels and sidestep bars, and had an 'Adrenalin' badge on the tailgate. Oh yeah, the B-pillars are color-matched also.