Whats the deal...does anyone know the reaon that the crew cabs never got the serpentine set up? All of the 89-91 blazers and burbans I have seen have the serpentine set up...but none of the 89-91 Crew Cabs have had it? Anyone know WHY?? In '91 maybe it was a toss up between the 4L80E/205 or the serpentine...fine, I'll take the 4L80E/205...but what about the other years!?