GMC Vandura P3500 (1985-1997) Computer data lines, commercial chassis

3 2 PPL BLK WIRE DATA CLSS 2 DIESEL ELECTRONIC BRAKE CONTROL MODULE (BELOW RADIATOR) ENG-BAT FUSE GASOLINE HOT AT ALL TIMES I/P FUSE BLOCK ORG/ WIRE PPL SERIAL DATA TAN WIRE TAN/WHT WIRE VEHICLE CONTROL MODULE (GASOLINE ONLY) (LEFT RADIATOR SUPPORT) WHT/BLK WIRE