Pcm differences LSx - LT1 Swap

1 1999-2002 TRUCK Connector C1 BLUEPinWire ColorCircuit ColorCircuit Ground41 BLK407 Sensor Ground (TRANS & CTS) with isolate ground o2 ( PPL - 719 EGR Low Reference)2LT GRN1867 Crankshaft Position Sensor B+ Supply42----Low Speed Cooling Fan Relay Control3 PNK/BLK1746 Injector 3 Control43 RED/BLK877 Injector 7 Control4LT GRN/BLK1745 Injector 2 Control44LT BLU/BLK844 Injector 4 Control5----Not Used45 GRA474 Fuel Tank Pressure Sensor 5V Reference6----Not Used46 GRA416TP Sensor 5V Reference ( Fuel Tank Pressure Sensor)7----Not Used47 GRA597 MAP Sensor 5V Reference ( EGR 5V Reference)8----Not Used48 GRA596 EGR Pintle Position Sensor 5V Reference ( MAP)9----Not Used49----Not Used10----Not Used50----Not Used11LT BLU1876 Knock Sensor Signal Rear51DK BLU496 Knock Sensor Signal Front12DK BLU/WHT1869 Crankshaft Position Sensor Signal52----Not Used13 ORN/BLK463 Requested Torque Signal (NW7)53 BLK470 Fuel Tank Pressure Sensor Ground14 ORN/BLK1061 UART Serial Data (drive by wire only)54 BLK452TP Sensor Ground ( MAP)

2 15DK BLU/WHT774 UART Serial Data (drive by wire only)55 BRN1456 EGR Pintle Position Sensor Signal16----Not Used56 WHT1579 Fuel Temperature/Composition Signal (L59 Flex Fuel)17DK BLU1225 Transmission Fluid Pressure Switch Signal B (A/T)57 ORN440 PCM Battery Supply18 RED1226 Transmission Fluid Pressure Switch Signal C (A/T)58DK GRN1049 Serial Data to OBD2 Port19 PNK439 PCM Ignition Supply59 YEL710 Serial Data to BCM20 ORN440 PCM Battery Supply60 ORN/BLK469 MAP Sensor Ground21 YEL/BLK1868 Crankshaft Position Sensor Ground61 PNK/BLK632 CMP Sensor Ground22----Not Used62----Not Used23 PPL719 Sensor Ground EGR ( BLK - 470 Ground to C2 Connector)63 GRA or TAN720 GRA - Engine Coolant Temperature (ECT)

3 Sensor Ground TAN - O2 Sensor Low Ref Ground24----Not Used64----Not Used25 TAN1671HO2S Signal Low Bank 2 Sensor 265 PPL1670HO2S Signal High Bank 2 Sensor 226 TAN1667HO2S Signal Low Bank 2 Sensor 166 PPL1666HO2S Signal High Bank 2 Sensor 127----Not Used67----Not Used28 TAN/WHT 1669HO2S Signal Low Bank 1 Sensor 268 PPL/WHT1668HO2S Signal High Bank 1 Sensor 229 TAN/WHT 1653HO2S Signal Low Bank 1 Sensor 169 PPL/WHT 1665HO2S Signal High Bank 1 Sensor 130LT GRN1478 Engine Coolant Level Switch70 BRN1174 Low Oil Level Switch31----Not Used71----PERFORMANCE MODE SWITCH32 BLK/WHT771 PRND A Input (may need grounded as well for CKP relearn)72 YEL772 PRND B Input33 PPL420 TCC Brake Switch73 BRN/WHT633 Camshaft Position (CMP) Sensor Signal34 WHT776 PRND P Input74 YEL410 Engine Coolant Temperature (ECT)

4 Sensor Signal35 GRA48 Clutch Switch Signal75 PNK1020 PCM Ignition Supply36 BLK1744 Injector 1 Control76 BLK/WHT845 Injector 5 Control37 YEL/BLK846 Injector 6 Control77DK BLU/WHT878 Injector 8 Control38 PNK/BLK1101 Damping Lift/Drive Signal78----Not Used39----Not Used79 WHT6873-2 Shift Solenoid Control40 BLK/WHT451 PCM Ground80 ORN/BLK510 Fuel Level Sensor Ground ( CTS) ColorCircuit ColorCircuit Ground41 WHT257 EGR Solenoid Ground2 BRN418 TCC Control Solenoid42 TAN/BLK422 TCC Enable Circuit (4L60-E only)3 TAN1465 Fuel Pump Relay Control - Secondary43DK GRN/WHT459A/C Clutch Relay Control4----Not Used44----Not Used5 TAN/BLK464 Delivered Torque Signal45 WHT1310 EVAP Canister Vent Valve Control6 RED/BLK 1228 Transmission Fluid Pressure Control Solenoid High46 BRN/WHT419 Malfunction Indicator Lamp (MIL)

5 Control7 RED1676 EGR Solenoid Supply47 YEL/BLK1223 Transmission Shift Solenoid B8LT BLU/WHT1229 Transmission Fluid Pressure Control Solenoid Low48LT GRN 1222 Transmission Shift Solenoid A9DK GRN/WHT465 Fuel Pump Relay Control49 YEL/BLK 1827 Vehicle Speed Output Circuit 128K10 WHT121 Engine Speed (Tach) Output Signal50DK GRN/WHT817 Vehicle Speed Output Circuit 4K11DK BLU604 Secondary A/C High Pressure Switch51 YEL/BLK1227 Transmission Temperature Sensor Signal12----Not Used52 GRY23 Generator Field Duty Cycle Signal13LT BLU/BLK396 Cruise Control Engage Signal53----Not Used14----Not Used54 PPL1589 Fuel Level Sensor Signal15 BRN25 Generator L Terminal55DK GRN603A/C Compressor Cycling Switch Signal16 GRA/BLK16944 Wheel Drive Switch Signal Low56----Not Used17DK GRN/WHT762A/C Request Signal57 BLK552 IAT Sensor Ground18----Not Used58----Not Used19

6 BLK/WHT16954 Wheel Drive Front Axle Switch59----Not Used20LT GRN/BLK822 Vehicle Speed Sensor (VSS) Reference Low60 BRN2129 Ignition Control Reference Low Bank 121 PPL/WHT 821 Vehicle Speed Sensor (VSS) Signal61 BRN/WHT2130 Ignition Control Reference Low Bank 222 RED/BLK1230 Vehicle Speed Sensor (VSS) Signal ( Only)62 GRA773 PRND C23DK BLU/WHT1231 Vehicle Speed Sensor (VSS) Reference Low ( Only)63 PNK1224 Transmission Fluid Pressure Switch Signal A (A/T)24DK BLU417TP Sensor Signal64DK GRN890 Fuel Tank Pressure Sensor Signal25 TAN472 IAT Sensor Signal65----Not Used26 PPL2121 Ignition Control 166 PPL/WHT 2128 Ignition Control 827 RED2127 Ignition Control 767 RED/WHT2122 Ignition Control 228LT BLU/WHT2126 Ignition Control 668DK GRN 2125 Ignition Control 529DK GRN/WHT2124 Ignition Control 469LT BLU 2123 Ignition Control 330----Not Used70----Not Used31 YEL492 MAF Sensor Signal71----Not Used32LT GRN432 MAP Sensor Signal72----Not Used33DK GRN 1614 HVAC Recirculation Door Control (or use this)

7 Pin for FAN 2 Contrl)73DK BLU 1936 Fuel Level Sensor Signal - Secondary34DK GRN/WHT428 EVAP Canister Purge Solenoid Control74LT GRN/WHT3213HO2S Heater Control (w/isolated grounded o2 sensors 2001-02 ONLY)35----Not Used75----Not Used36 BRN436 AIR Pump Relay Control (w/NC1)76LT GRN/WHT1749 IAC Coil B High - IAC BIN B37----Not Used77LT GRN/BLK444 IAC Coil B Low - IAC PIN A38----(express fuel level sensor PWM output78LT BLU/BLK1748 IAC Coil A Low - IAC PIN C39 RED631 CMP Sensor B+ Supply79LT BLU/WHT1747 IAC Coil A High - IAC PIN D40 BLK/WHT 451 PCM Ground80LT GRN 3212HO2S Heater Low Reference (w/isolated grounded sensors 2001-02 ONLY) TRUCK Connector C2 RED