GMC Rally G2500 (1985-1995) Wiring diagram engine performance 4.3l (vin z)s, m/t commercial chassis

AIR CONDITIONING SYSTEM BATTERY FEED FUEL PUMP SIGNAL IC REFERENCE LOW BLK WIRE BLK/RED WIRE BLK/WHT WIRE BRN/WHT WIRE CRANK SIGNAL ECT SIGNAL MAP SIGNAL CRNK FUSE ECM-CRNK FUSE DATA LINK CONNECTOR (BEHIND LEFT SIDE OF SHIPPING PANEL) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM BAT FUSE EGR CONTROL MALFUNCTION INDICATOR LAMP IGN ECM FUSED ENGINE COOLANT TEMPERATURE SENSOR (TOP FRONT OF ENGINE) FUEL PUMP RELAY FUSE BLOCK GRY WIRE HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START HOT IN START IAC B LOW IAC B HIGH IAC A HIGH IAC A LOW IC CONTROL IC BYPASS OXYGEN SENSOR GROUND OXYGEN SENSOR SIGNAL IC REFERENCE HIGH IDLE AIR CONTROL ACTUATOR (TOP REAR OF ENGINE) INJ FUSE INJECTOR 2 CONTROL INJECTOR 1 CONTROL INJECTOR 1 CONTROL KNOCK SIGNAL A/C SIGNAL LT BLU/BLK WIRE LT BLU/WHT WIRE LT BLU/WTH WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE LT GRN/WTH WIRE MANIFOLD ABSOLUTE PRESSURE SENSOR (TOP REAR OF ENGINE) ORG/ WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (LEFT SIDE OF SHIPPING PANEL) PPL PPL/WHT WIRE RED WIRE SERIAL DATA DIAGNOSTIC TEST TERMINAL VSS SIGNAL SENSOR GROUND SYSTEM GROUND SYSTEM GROUND MAP SENSOR GROUND TAN WIRE TAN/BLK WIRE THROTTLE BODY FUEL INJECTOR #1 (TOP OF THROTTLE BODY UNIT) THROTTLE BODY FUEL INJECTOR #2 (TOP OF THROTTLE BODY UNIT) THROTTLE POSITION SENSOR (TOP RIGHT SIDE OF ENGINE) TP SIGNAL 5 VOLT REF INJECTOR 2 CONTROL BATTERY FEED WHT WIRE WHT/BLK WIRE YEL WIRE

3 121 PNK WIRE 4.3L 5.7L ACCY ALT FUSE BLK WIRE BLK/RED WIRE BLK/WHT WIRE BRN/WHT WIRE BULB TEST DISTRIBUTOR (TOP REAR OF ENGINE) DK BLU WIRE DK GRN/WHT WIRE FUEL PUMP AND SENDER (IN FUEL TANK) FUEL PUMP OIL PRESSURE SWITCH (TOP REAR OF ENGINE) FUEL PUMP PRIME CONNECTOR FUEL PUMP RELAY (LOWER LEFT SIDE OF SHIPPING PANEL) FUSE BLOCK GRY WIRE HOT AT ALL TIMES HOT IN RUN, BULB TEST OR START IGNITION COIL (TOP OF ENGINE NEAR DISTRIBUTOR) IGNITION SWITCH INSTRUMENT CLUSTER KNOCK SENSOR (RIGHT SIDE OF ENGINE) KNOCK SENSOR MODULE (TOP RIGHT SIDE OF ENGINE) LOCK OFF LT GRN/BLK WIRE MALFUNCTION (SERVICE ENGINE SOON) INDICATOR NCA WIRE ORG/ WIRE OXYGEN SENSOR (IN EXHAUST MANIFOLD) HEATED OXYGEN SENSOR (IN EXHAUST MANIFOLD) PNK PPL PPL WIRE PNK WIRE PNK/BLK WIRE PPL PPL/WHT WIRE PROVISIONS FOR TACHOMETER RED WIRE RUN WIRE TAN/BLK WIRE VEHICLE SPEED SENSOR (LEFT REAR OF TRANSMISSION) VEHICLE SPEED SENSOR BUFFER (BEHIND RIGHT SIDE OF I/P) WHT WIRE