Wiring diagram engine performance 7.4l (vin n)s, a/t for GMC Cab & Chassis C2500 (1989-2000)

AIR CONDITION- ING SYSTEM BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE COOLANT TEMP. SENSOR DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/WHT WIRE DLC THROTTLE POSITION SENSOR IN LO SIDE INJ A EGR VALVE SOLENOID ELEC FUEL PUMP IN MAP SENSOR IN ENG-I MINI FUSE EVAP CANISTER PURGE CTRL EVAPORATIVE CANISTER PURGE SOLENOID (RIGHT SIDE OF ENGINE) FUEL PUMP RELAY CTRL PCM TRANS FORCE MTR LO GRY WIRE GRY/BLK WIRE HOT IN RUN OR START IDLE AIR CONTROL UNIT (RIGHT REAR OF TBI UNIT) IGNITION BYPASS KNOCK SENSOR IN LINEAR EGR POSITION IN LINEAR EGR REGULATOR SOLENOID VALVE (LEFT REAR OF ENGINE) LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE ORG/ WIRE OXYGEN SENSOR LO PCM TO TRANS TEMP SENSOR PCM TRANS RANGE A TRANS INPUT SPEED IN HI TRANS INPUT SPEED IN LO PCM TRANS RANGE B PCM TRANS RANGE C MIL INDICATOR CTRL PCM TRANS SHIFT SOL B PCM TRANS SHIFT SOL A PNK PNK PNK 25 26 27 WIRE PNK WIRE POWERTRAIN CONTROL MODULE (UNDER RIGHT SIDE OF I/P) PPL PPL 1 2 3 4 PPL 22 23 PPL/WHT WIRE RED WIRE RED/BLK WIRE TAN WIRE TAN/BLK WIRE TAN/WHT WIRE THROTTLE ACTUATOR SOL CTRL TCC CLUTCH CTRL A/C ON SIGNAL IN BRAKE SW TO PCM THROTTLE BODY FUEL INJECTOR #1 (TOP OF THROTTLE BODY UNIT) THROTTLE BODY FUEL INJECTOR #2 (TOP OF THROTTLE BODY UNIT) TRANSMISSION INPUT SHAFT SPEED SENSOR (LEFT SIDE OF TRANS- MISSION) TRANSMISSIONS SYSTEM WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

423 3 121 PNK WIRE ACCY BLK WIRE BRN WIRE BRN/WHT WIRE BULB TEST DISTRIBUTOR (CENTER REAR OF ENGINE) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE COOLANT TEMPERATURE SENSOR (RIGHT TOP FRONT OF ENGINE) GAUGES FUSE 4 GRY WIRE HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK (BEHIND LEFT SIDE OF I/P) IGNITION COIL (CENTER REAR OF ENGINE) IGNITION SWITCH INSTRUMENT CLUSTER KNOCK SENSOR (REAR OF LEFT CYLINDER HEAD) LOCK OFF LT BLU/WHT WIRE LT GRN WIRE MANIFOLD ABSOLUTE PRESSURE SENSOR (REAR TOP CENTER OF ENGINE) NCA WIRE ORG/ WIRE PNK PNK PNK 25 26 27 WIRE PNK WIRE PNK/BLK WIRE PPL PPL 1 2 3 4 PPL 22 23 PPL/WHT WIRE RED WIRE RED/BLK WIRE RUN WIRE SERVICE ENGINE SOON INDICATOR TACHOMETER TEST LEAD TAN WIRE TAN/BLK WIRE TCC/BRAKE SWITCH (TOP OF BRAKE PEDAL BRACKET) THROTTLE POSITION SENSOR (RIGHT SIDE OF THROTTLE BODY) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE BLK/WHT WIRE BRN WIRE DATA LINK CONNECTOR (UNDER LEFT SIDE OF I/P) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM-B MINI FUSE FUEL PUMP AND SENDER FUEL PUMP OIL PRESSURE SWITCH/SENDER (LEFT LOWER FRONT OF ENGINE, NEAR DAMPER) FUEL PUMP PRIME CONN- ECTOR FUEL PUMP RELAY (UNDERHOOD FUSE/RELAY CENTER) GRY WIRE HEAVY DUTY ELECTRONIC 4-SPEED AUTOMATIC OVERDRIVE TRANSMISSION HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE BLOCK (BEHIND LEFT SIDE OF I/P) IDLE SPEED CONTROL ACTUATOR (ON THROTTLE BODY UNIT) INSTRUMENT CLUSTER LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE OIL PRESS IN ORG/ WIRE OXYGEN SENSOR (EXHAUST PIPE NEAR CROSSOVER) PNK WIRE PPL PPL/WHT WIRE PRESSURE CONTROL SOLENOID RANGE MODE SELECTOR RED WIRE RED/BLK WIRE SHIFT SOLENOID 1-2 SHIFT SOLENOID 2-3 TORQUE CONVERTER CLUTCH SOLENOID TACH IN TAN WIRE TRANS FUSE 20 TRANS- MISSION TEMP SENSOR UNDERHOOD FUSE/RELAY CENTER (LEFT REAR OF ENGINE COMPT) VEHICLE SPEED SENSOR (LEFT REAR SIDE OF TRANSMISSION) VEHICLE SPEED SENSOR BUFFER (UNDER RIGHT END OF I/P) VSS IN WHT WIRE WHT/BLK WIRE YEL/BLK WIRE