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Pcm 454 7 4l wiring diagram replacing or repowering your mercruiser 454 or 502 marine cp performance wiring harness efi mercruiser 454 502 mpi mag bravo gen vi wiring harness a 1995 350 motor from a 1995 1500 pickup to a 1976 chevy need wiring diagram for engine harness 97 gmc 3500 hd 454 cp performance wiring harness engine 5 7 vortec firing order diagram best place to find mercruiser . Need engine or wiring diagram for a 1995 chevy 3500 454 4x4 manual truck answered by a verified chevy mechanic need engine or wiring diagram for a 1995 chevy 3500 454 4x4 manual truck submitted 9 years ago category chevy show more here is a file with the pcm wiring diagrams the 454 is the 74l so ignore the ones that says 43 . Autozone repair guide for your chassis electrical wiring diagrams wiring diagrams battery cables circuit protection cruise control fig fig 7 1988 90 gm r v series wiring schematic fig fig 8 1991 gm r v series wiring schematic 1994 pick up sierra 43l and 74l w mt engine schematic fig fig 12 1994 gm truck 50l and 57l w . I need wiring diagrams large enough to reed wire color and relay name the ones i recived from sam were to small and would not enlarge i would like to buy a set of wiring diagrams for a 1991suburban with 454 74l and 4l80e trans thanks. Mercruiser 74l bravo gm 454 v 8 1988 1991 wiring harness electrical and ignition parts buy a genuine mercury quicksilver or aftermarket part