Home/GMC/Sierra 3500/GMC Sierra 3500 (2002-2006)/Repair manual/Testing & Diagnostics/Engine Controls - 8.1L (Introduction): Wiring
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Engine Controls - 8.1L (Introduction): Wiring GMC Sierra 3500

Testing & Diagnostics ~2824 words

Powertrain Control Module (PCM) Connector End Views

Powertrain Control Module (PCM) - C1 Connector End Connector Part Information 12191489 80-Way F Micro-Pack 100W Sealed (BLU) Pin Wire Color Circuit No. Function 1 BLK/WHT 451 Ground 2 LT GRN 1867 12 Volt Reference 3 PNK/BLK 1746 Fuel Injector 3 Control 4 LT GRN/BLK 1745 Fuel Injector 2 Control 5 - 6 - - Not Used 7 GRY 2705 5 Volt Reference 8-10 - - Not Used 11 LT BLU 1876 Knock Sensor 2 Signal 12 DK BLU/ WHT 1869 CKP Sensor Signal 13 ORN/BLK 463 Requested Torque Signal 14 ORN/BLK 1061 UART Serial Data 15 DK BLU/ WHT 774 UART Serial Data 16-17 - - Not Used 18 DK GRN 1433 Clutch Start Switch Signal (M/T) 19 PNK 439 Ignition 1 Voltage 20 ORN 440 Battery Positive Voltage 21 YEL/BLK 1868 Low Reference 22 LT GRN 488 PTO Enable Switch (w/PTO) 23 BLK 470 Low Reference 24 BLK/WHT 451 Ground 25 TAN 1671 HO2S Low Signal Bank 2 Sensor 2 (w/NC1) 26 TAN 1677 HO2S Low Signal Bank 2 Sensor 1 27 BLK/WHT 451 Ground 28 TAN 1669 HO2S Low Signal Bank 1 Sensor 2 (w/NC1) 29 TAN 1664 HO2S Low Signal Bank 1 Sensor 1 30 LT GRN 1478 Coolant Level Switch Signal 31 - 32 - - Not Used 33 PPL 420 TCC Brake Switch/Cruise Control Release Signal 34 ORN/BLK 1786 Park/Neutral Signal (Allison Transmission Only) 35 GRY 48 CPP Switch Signal (M/T) 36 BLK 1744 Fuel Injector 1 Control 37 YEL/BLK 846 Fuel Injector 6 Control 38 - - Not Used 39 YEL/BLK 625 Starter Enable Relay Control 40 BLK/WHT 451 Ground 41 PPL 719 Low Reference 42 - - Not Used 43 RED/BLK 877 Fuel Injector 7 Control 44 LT BLU/BLK 844 Fuel Injector 4 Control 45 GRY 2700 5 Volt Reference 46 GRY 474 5 Volt Reference 47 GRY 596 5 Volt Reference 48 GRY 597 5 Volt Reference 49-50 - - Not Used 51 DK BLU 496 Knock Sensor 1 Signal 52 YEL 2522 PTO Status (w/PTO) 53 - - Not Used 54 ORN/BLK 469 Low Reference 55 BRN 1456 EGR Valve Position Signal 56 - - Not Used 57 ORN 440 Battery Positive Voltage 58 DK GRN 1049 PCM Class 2 Serial Data 59 YEL 710 Class 2 Serial Data 60 - - Not Used 61 PNK/BLK 632 Low Reference 62 - - Not Used 63 BLK 2755 Low Reference 64 BLK/WHT 451 Ground 65 PPL 1670 HO2S High Signal Bank 2 Sensor 2 (w/NC1) 66 PPL 1666 HO2S High Signal Bank 2 Sensor 1 67 BLK/WHT 451 Ground 68 PPL/WHT 1668 HO2S High Signal Bank 1 Sensor 2 (w/NC1) 69 PPL/WHT 1665 HO2S High Signal Bank 1 Sensor 1 70 BRN 1174 Oil Level Switch Signal 71 LT BLU 494 PTO Engine Kill (w/PTO) 72 - - Not Used 73 BRN/WHT 633 CMP Sensor Signal 74 YEL 410 ECT Sensor Signal 75 PNK 1020 Off/Run/Crank Voltage 76 BLK/WHT 845 Fuel Injector 5 Control 77 DK BLU/ WHT 878 Fuel Injector 8 Control 78 PPL 2562 PTO Engage (w/PTO) 79 - - Not Used 80 BLK 407 Low Reference

Powertrain Control Module (PCM) - C2 Connector End Connector Part Information 12191488 80-Way F Micro-Pack 100W Sealed (RED) Pin Wire Color Circuit No. Function 1 BLK/WHT 451 Ground 2 WHT 2467 Torque Response Reply Signal (Allison Trans Only) 3 TAN 1465 Fuel Pump Relay Control - Secondary 4 - - Not Used 5 TAN/BLK 464 Delivered Torque Signal (Allison Trans Only) 6 - - Not Used 7 RED 1676 EGR Valve Supply Voltage 8 - - Not Used 9 DK GRN/ WHT 465 Fuel Pump Relay Control 10 WHT 121 Engine Speed Signal 11 - - Not Used 12 DK BLU 2466 Trans MIL Request Signal (Allison Trans Only) 13 - - Not Used 14 RED/BLK 380 A/C Refrigerant Pressure Sensor Signal 15 BRN 25 Charge Indicator Control 16 GRY/BLK 1694 4WD Low Signal (w/4WD) 17 - 18 - - Not Used 19 BLK/WHT 1695 Axle Switch Signal (w/NP2) 20 LT GRN/BLK 822 VSS Low Signal 21 PPL/WHT 821 VSS High Signal (Except Allison Transmission YEL 400 Signal High - Front (Allison Trans Only) 22 - 24 - - Not Used 25 TAN 472 IAT Sensor Signal 26 PPL 2121 IC 1 Control 27 RED 2127 IC 7 Control 28 LT BLU/WHT 2126 IC 6 Control 29 DK GRN/ WHT 2124 IC 4 Control 30 - - Not Used 31 YEL 492 MAF Sensor Signal 32 LT GRN 432 MAP Sensor Signal 33 - - Not Used 34 DK GRN/ WHT 428 EVAP Canister Purge Solenoid Control 35-38 - - Not Used 39 RED 631 12 Volt Reference 40 BLK/WHT 451 Ground 41 WHT 257 EGR Solenoid Control 42 - - Not Used 43 DK GRN/ WHT 459 A/C Compressor Clutch Relay Control 44 - - Not Used 45 WHT 1310 EVAP Canister Vent Solenoid Control 46 BRN/WHT 419 MIL Control 47 - 48 - - Not Used 49 YEL/BLK 1827 Vehicle Speed Signal 50 DK GRN/ WHT 817 Vehicle Speed Signal 51 - - Not Used 52 BRN 2391 HO2S Heater Low Control Bank 1 Sensor 2 (W/NC1) 53 RED/WHT 3223 HO2S Heater Low Control Bank 2 Sensor 2 (W/NC1) 54 PPL 1589 Fuel Level Sensor Signal 55 - 56 - - Not Used 57 BLK 552 Low Reference 58 TAN/WHT 332 Oil Pressure Sensor Signal 59 PPL 806 Crank Voltage 60 BRN 2129 Low Reference 61 BRN/WHT 2130 Low Reference 62 - 63 - - Not Used 64 DK GRN 890 Fuel Tank Pressure Sensor Signal 65 - - Not Used 66 PPL/WHT 2128 IC 8 Control 67 RED/WHT 2122 IC 2 Control 68 DK GRN 2125 IC 5 Control 69 LT BLU 2123 IC 3 Control 70-71 - - Not Used 72 BLK/WHT 3122 HO2S Heater Low Control Bank 1 Sensor 2 (w/NC1) 73 DK BLU 1936 Fuel Level Sensor Signal - Secondary 74 LT GRN/WHT 3213 HO2S Heater Low Control Bank 2 Sensor 1 75-79 - - Not Used 80 BLK 2751 Low Reference

Engine Controls Connector End Views

Accelerator Pedal Position (APP) Sensor Connector End Connector Part Information 15318071 10-Way F Metri-Pack 150 Series (GRY) Pin Wire Color Circuit No. Function A GRY 1273 Low Reference B PPL 1272 5-Volt Reference C LT BLU 1162 APP Sensor 2 Signal D TAN 1274 Low Reference E BRN 1271 Low Reference F DK BLU 1161 APP Sensor 1 Signal G WHT/BLK 1164 5-Volt Reference H - - Not Used J YEL/BLK 1275 5-Volt Reference K DK GRN 1163 APP Sensor 3 Signal

Camshaft Position (CMP) Sensor Connector End Connector Part Information 12129946 3-Way F Metri-Pack 150 Series Sealed (GRY) Pin Wire Color Circuit No. Function A RED 631 12-Volt Reference B PNK/BLK 632 Low Reference C BRN/WHT 633 CMP Sensor Signal

Crankshaft Position (CKP) Sensor Connector End Connector Part Information 15324165 3-Way F Metri-Pack 150 Series (NAT) Pin Wire Color Circuit No. Function A LT GRN 1867 12-Volt Reference B YEL/BLK 1868 Low Reference C DK BLU/WHT 1869 CKP Sensor Signal

Engine Coolant Temperature (ECT) Sensor Connector End Connector Part Information 15324589 3-Way F Metri-Pack 150 Series Sealed (GRY) Pin Wire Color Circuit No. Function A BLK 407 Low Reference B YEL 410 ECT Sensor Signal C - - Not Used

Evaporative Emission (EVAP) Canister Purge Solenoid Connector End Connector Part Information 12052643 2-Way F Metri-Pack 150 Series Sealed (RED) Pin Wire Color Circuit No. Function A PNK 439 Ignition 1 Voltage B DK GRN/WHT 428 EVAP Canister Purge Solenoid Control

Evaporative Emission (EVAP) Canister Vent Solenoid Connector End Connector Part Information 12052643 2-Way F Metri-Pack 150 Series Sealed (RED) Pin Wire Color Circuit No. Function A WHT 1310 EVAP Canister Vent Solenoid Control B PNK 2640 Battery Positive Voltage

Exhaust Gas Recirculation (EGR) Valve Connector End Connector Part Information 12186056 5-Way F Metri-Pack 150.2 P2S Sealed (BLK) Pin Wire Color Circuit No. Function A WHT 257 EGR Solenoid Control B PPL 719 Low Reference C BRN 1456 EGR Valve Position Signal D GRY 596 5-Volt Reference E RED 1676 EGR Valve Supply Voltage

Fuel Injector 1 Connector End Connector Part Information 12129140 2-Way F Metri-Pack 280.1 P2S (BLK) Pin Wire Color Circuit No. Function A WHT 1039 Ignition 1 Voltage B BLK 1744 Fuel Injector 1 Control

Fuel Injector 2 Connector End Connector Part Information 12129140 2-Way F Metri-Pack 280.1 P2S (BLK) Pin Wire Color Circuit No. Function A PNK 1239 Ignition 1 Voltage B LT GRN/BLK 1745 Fuel Injector 2 Control

Fuel Injector 3 Connector End Connector Part Information 12129140 2-Way F Metri-Pack 280.1 P2S (BLK) Pin Wire Color Circuit No. Function A WHT 1039 Ignition 1 Voltage B PNK/BLK 1746 Fuel Injector 3 Control

Fuel Injector 4 Connector End Connector Part Information 12129140 2-Way F Metri-Pack 280.1 P2S (BLK) Pin Wire Color Circuit No. Function A PNK 1239 Ignition 1 Voltage B LT BLU/BLK 844 Fuel Injector 4 Control

Fuel Injector 5 Connector End Connector Part Information 12129140 2-Way F Metri-Pack 280.1 P2S (BLK) Pin Wire Color Circuit No. Function A WHT 1039 Ignition 1 Voltage B BLK/WHT 845 Fuel Injector 5 Control

Fuel Injector 6 Connector End Connector Part Information 12129140 2-Way F Metri-Pack 280.1 P2S (BLK) Pin Wire Color Circuit No. Function A PNK 1239 Ignition 1 Voltage B YEL/BLK 846 Fuel Injector 6 Control

Fuel Injector 7 Connector End Connector Part Information 12129140 2-Way F Metri-Pack 280.1 P2S (BLK) Pin Wire Color Circuit No. Function A WHT 1039 Ignition 1 Voltage B RED/BLK 877 Fuel Injector 7 Control

Fuel Injector 8 Connector End Connector Part Information 12129140 2-Way F Metri-Pack 280.1 P2S (BLK) Pin Wire Color Circuit No. Function A PNK 1239 Ignition 1 Voltage B DK BLU/WHT 878 Fuel Injector 8 Control

Fuel Pump (FP) Relay - Secondary (w/Dual Tanks) Connector End Connector Part Information 12129716 4-Way F Metri-Pack 280 FLX LK (MD GRY) Pin Wire Color Circuit No. Function 30 PNK 239 Ignition 1 Voltage 85 GRY 120 Fuel Pump Supply Voltage 86 TAN 1465 Fuel Pump Relay Control 87 LT GRN 1058 Fuel Balance Pump Supply Voltage

Fuel Pump and Sender Assembly - Primary Connector End Connector Part Information 12160482 4-Way F Metri-Pack 150 Series Sealed (BLK) Pin Wire Color Circuit No. Function A PPL 1589 Fuel Level Sensor Signal B GRY 120 Fuel Pump Supply Voltage C BLK 2150 Ground D BLK 470 Low Reference

Fuel Pump and Sender Assembly - Secondary (w/Dual Tanks) Connector End Connector Part Information 12160482 4-Way F Metri-Pack 150 Series Sealed (BLK) Pin Wire Color Circuit No. Function A DK BLU 1936 Fuel Level Sensor Signal B LT GRN 1058 Fuel Balance Pump Supply Voltage C BLK 2150 Ground D BLK 470 Low Reference

Fuel Tank Pressure (FTP) Sensor Connector End Connector Part Information 12059595 3-Way F Metri-Pack 150 Series Sealed (BLK) Pin Wire Color Circuit No. Function A BLK 470 Low Reference B DK GRN 890 Fuel Tank Pressure Sensor Signal C GRY 474 5-Volt Reference

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Connector End Connector Part Information 12092839 4-Way M Metri-Pack 150 Series Sealed (BLK) Pin Wire Color Circuit No. Function A TAN/WHT 1669 HO2S Low Signal Bank 1 Sensor 1 B PPL/WHT 1665 HO2S High Signal Bank 1 Sensor 1 D PNK 539 Ignition 1 Voltage E BLK/WHT 3113 HO2S Heater Low Control Bank 1 Sensor 1

Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 (w/NC1) Connector End Connector Part Information 12146047 4-Way F Metri-Pack 150 Series (BLK) Pin Wire Color Circuit No. Function A WHT 1669 HO2S Low Signal Bank 1 Sensor 2 B PPL/WHT 1668 HO2S High Signal Bank 1 Sensor 2 D PNK 1539 Ignition 1 Voltage E BRN 2391 HO2S Heater Low Control Bank 1 Sensor 2

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 Connector End Connector Part Information 12092839 4-Way M Metri-Pack 150 Series Sealed (BLK) Pin Wire Color Circuit No. Function A TAN 1667 HO2S Low Signal Bank 2 Sensor 1 B PPL 1666 HO2S High Signal Bank 2 Sensor 1 D PNK 539 Ignition 1 Voltage E LT GRN 3212 HO2S Heater Low Control Bank 2 Sensor 1

Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 (w/NC1) Connector End Connector Part Information 12092839 4-Way M Metri-Pack 150 Series Sealed (BLK) Pin Wire Color Circuit No. Function A TAN 1671 HO2S Low Signal Bank 2 Sensor 2 B PPL 1670 HO2S High Signal Bank 2 Sensor 2 D PNK 1539 Ignition 1 Voltage E RED/WHT 3223 HO2S Heater Low Control Bank 2 Sensor 2

Ignition Coil 1 Connector End Connector Part Information 12162144 4-Way F Metri-Pack 150 Series Sealed (BLK) Pin Wire Color Circuit No. Function A BLK 550 Ground B BRN 2129 Low Reference C PPL 2121 IC 1 Control D PNK 1039 Ignition 1 Voltage

Ignition Coil 2 Connector End Connector Part Information 12162144 4-Way F Metri-Pack 150 Series Sealed (BLK) Pin Wire Color Circuit No. Function A BLK 550 Ground B BRN/WHT 2130 Low Reference C RED/WHT 2122 IC 2 Control D PNK 1239 Ignition 1 Voltage

Ignition Coil 3 Connector End Connector Part Information 12162144 4-Way F Metri-Pack 150 Series Sealed (BLK) Pin Wire Color Circuit No. Function A BLK 550 Ground B BRN 2129 Low Reference C LT BLU 2123 IC 3 Control D PNK 1039 Ignition 1 Voltage

Ignition Coil 4 Connector End Connector Part Information 12162144 4-Way F Metri-Pack 150 Series Sealed (BLK) Pin Wire Color Circuit No. Function A BLK 550 Ground B BRN/WHT 2130 Low Reference C DK GRN/WHT 2124 IC 4 Control D PNK 1239 Ignition 1 Voltage

Ignition Coil 5 Connector End Connector Part Information 12162144 4-Way F Metri-Pack 150 Series Sealed (BLK) Pin Wire Color Circuit No. Function A BLK 550 Ground B BRN 2129 Low Reference C DK GRN 2125 IC 5 Control D PNK 1039 Ignition 1 Voltage

Ignition Coil 6 Connector End Connector Part Information 12162144 4-Way F Metri-Pack 150 Series Sealed (BLK) Pin Wire Color Circuit No. Function A BLK 550 Ground B BRN/WHT 2130 Low Reference C LT BLU/WHT 2126 IC 6 Control D PNK 1239 Ignition 1 Voltage

Ignition Coil 7 Connector End Connector Part Information 12162144 4-Way F Metri-Pack 150 Series Sealed (BLK) Pin Wire Color Circuit No. Function A BLK 550 Ground B BRN 2129 Low Reference C RED 2127 IC 7 Control D PNK 1039 Ignition 1 Voltage

Ignition Coil 8 Connector End Connector Part Information 12162144 4-Way F Metri-Pack 150 Series Sealed (BLK) Pin Wire Color Circuit No. Function A BLK 550 Ground B BRN/WHT 2130 Low Reference C PPL/WHT 2128 IC 8 Control D PNK 1239 Ignition 1 Voltage

Intake Air Temperature (IAT)/Mass Air Flow (MAF) Sensor Connector End Connector Part Information 15305555 5-Way F Metri-Pack 150 Series (BLK) Pin Wire Color Circuit No. Function A BLK 552 Low Reference B TAN 472 IAT Sensor Signal C BLK/WHT 451 Ground D PNK 439 Ignition 1 Voltage E YEL 492 MAF Sensor Signal

Manifold Absolute Pressure (MAP) Sensor Connector End Connector Part Information 12129946 3-Way F Metri-Pack 150 Series Sealed (GRY) Pin Wire Color Circuit No. Function A ORN/BLK 469 Low Reference B LT GRN 432 MAP Sensor Signal C GRY 597 5-Volt Reference

Throttle Actuator Control (TAC) Module - C1 Connector End Connector Part Information 12191065 16-Way F Micro-Pack 100 Series (NAT) Pin Wire Color Circuit No. Function 1 DK GRN 485 TP Sensor 1 Signal 2 GRY 416 5-Volt Reference 3 BLK 452 Low Reference 4 DK BLU 84 Cruise Control Set/Coast Switch Signal 5 GRY/BLK 87 Cruise Control Resume/Accel Switch Signal 6 LT BLU 1320 CHMSL Supply Voltage 7 PNK 1339 Ignition 1 Voltage 8 BRN 582 TAC Motor Control - 2 9 LT BLU/BLK 1688 5-Volt Reference 10 BLK/WHT 1704 Low Reference 11 PPL 486 TP Sensor 2 Signal 12 ORN/BLK 1061 UART Serial Data 13 DK BLU/WHT 774 UART Serial Data 14 GRY 397 Cruise Control On Switch Signal 15 BLK/WHT 550 Ground 16 YEL 581 TAC Motor Control - 1

Throttle Actuator Control (TAC) Module - C2 Connector End Connector Part Information 12177081 10-Way F 150 Series Sealed (NAT) Pin Wire Color Circuit No. Function A GRY 1273 Low Reference B PPL 1272 5-Volt Reference C LT BLU 1162 APP Sensor 2 Signal D TAN 1274 Low Reference E YEL/BLK 1275 5-Volt Reference F DK BLU 1161 APP Sensor 1 Signal G WHT/BLK 1164 5-Volt Reference H - - Not Used J BRN 1271 Low Reference K DK GRN 1163 APP Sensor 3 Signal

Throttle Body Connector End Connector Part Information 15326836 8-Way F GT 150 Series (BLK) Pin Wire Color Circuit No. Function A YEL 581 TAC Motor Control - 1 B BLK/WHT 1704 Low Reference C BRN 582 TAC Motor Control - 2 D BLK 452 Low Reference E LT BLU/BLK 1688 5-Volt Reference F PPL 486 TP Sensor 2 Signal G DK GRN 485 TP Sensor 1 Signal H GRY 416 5-Volt Reference