Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2005 Pontiac Grand Prix BaseFACTORY OEM SERVICE PROCEDURE
Engine Controls Connector End Views
Accelerator Pedal Position (APP) Sensor Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PU | 1272 | Low Reference |
| B | L-BU | 1162 | APP Sensor 2 Signal |
| C | TN | 1274 | 5-Volt Reference |
| D | BN | 1271 | Low Reference |
| E | D-BU | 1161 | APP Sensor 1 Signal |
| F | WH/BK | 1164 | 5-Volt Reference |
Barometric Pressure (BARO) Sensor (L32) Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | BK | 476 | Low Reference |
| B | GY/BK | 433 | BARO Sensor Signal |
| C | GY | 597 | 5-Volt Reference |
Camshaft Position (CMP) Sensor Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | BN/WH | 633 | CMP Sensor Signal |
| B | BK/WH | 836 | Low Reference |
| C | WH/BK | 644 | 12-Volt Reference |
Crankshaft Position (CKP) Sensor Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | L-BU/WH | 1800 | CKP Sensor 2 Signal |
| B | YE | 573 | CKP Sensor 1 Signal |
| C | BK/WH | 836 | Low Reference |
| D | WH/BK | 644 | 12-Volt Reference |
Engine Coolant Temperature (ECT) Sensor Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | YE | 2761 | Low Reference |
| B | BK | 410 | ECT Sensor Signal |
Evaporative Emission (EVAP) Canister Purge Solenoid Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 339 | Ignition 1 Voltage |
| B | D-GN/WH | 428 | EVAP Canister Purge Solenoid Control |
Evaporative Emissions (EVAP) Canister Vent Solenoid Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | OG | 2840 | Battery Positive Voltage |
| B | WH | 1310 | EVAP Canister Vent Solenoid Control |
Exhaust Gas Recirculation (EGR) Valve Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | GY | 435 | EGR Solenoid Low Control |
| B | BK | 2753 | Low Reference |
| C | BN | 1456 | EGR Valve Position Signal |
| D | GY | 2702 | 5-Volt Reference |
| E | RD | 1676 | EGR Solenoid High Control |
Fuel Injector 1 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 639 | Ignition 1 Voltage |
| B | BK | 1744 | Fuel Injector 1 Control |
Fuel Injector 2 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 639 | Ignition 1 Voltage |
| B | L-GN/BK | 1745 | Fuel Injector 2 Control |
Fuel Injector 3 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 639 | Ignition 1 Voltage |
| B | PK/BK | 1746 | Fuel Injector 3 Control |
Fuel Injector 4 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 639 | Ignition 1 Voltage |
| B | L-BU/BK | 844 | Fuel Injector 4 Control |
Fuel Injector 5 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 639 | Ignition 1 Voltage |
| B | BK/WH | 845 | Fuel Injector 5 Control |
Fuel Injector 6 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 639 | Ignition 1 Voltage |
| B | YE/BK | 846 | Fuel Injector 6 Control |
Fuel Pump and Sender Assembly Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PU | 30 | Fuel Level Sensor Signal |
| B | GY | 120 | Fuel Pump Supply Voltage |
| C | BK | 150 | Ground |
| D | BK/WH | 651 | Low Reference |
Fuel Tank Pressure (FTP) Sensor Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | OG/BK | 469 | Low Reference |
| B | D-GN | 890 | Fuel Tank Pressure Sensor Signal |
| C | GY/BK | 416 | 5-Volt Reference |
Heated Oxygen Sensor (HO2S) Sensor 1 (NU3) Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | TN/WH | 3111 | HO2S Low Signal |
| B | PU/WH | 3110 | HO2S High Signal |
| C | BK/WH | 3112 | HO2S Heater Low Control Sensor 1 |
| D | PK | 839 | Ignition 1 Voltage |
Heated Oxygen Sensor (HO2S) Sensor 1 (w/o NU3) Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | TN/WH | 3111 | HO2S Low Signal |
| B | PU/WH | 3110 | HO2S High Signal |
| C | BK/WH | 3112 | HO2S Heater Low Control Sensor 1 |
| D | PK | 839 | Ignition 1 Voltage |
Heated Oxygen Sensor (HO2S) Sensor 2 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | TN/WH | 3121 | HO2S Low Signal |
| B | PU | 3120 | HO2S High Signal |
| C | BK/WH | 3122 | HO2S Heater Low Control Sensor 2 |
| D | PK | 839 | Ignition 1 Voltage |
Ignition Control Module (ICM) Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | WH | 423 | IC Timing Control |
| B | TN/BK | 424 | IC Timing Signal |
| C | L-BU/BK | 647 | Medium Resolution Engine Speed Signal |
| D | PU/WH | 430 | Low Resolution Engine Speed Signal |
| E | WH | 121 | Engine Speed Signal |
| F | BK | 630 | Camshaft Position Signal |
| G | YE | 573 | CKP Sensor 1 Signal |
| H | L-BU/WH | 1800 | CKP Sensor 2 Signal |
| J | BN/WH | 633 | CMP Sensor Signal |
| K | BK/WH | 541 | Ground |
| L | RD/BK | 453 | Low Reference |
| M | BK/WH | 836 | Low Reference |
| N | WH/BK | 644 | 12-Volt Reference |
| P | PK | 239 | Ignition 1 Voltage |
Knock Sensor (KS) Bank 1 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | D-BU | 496 | Knock Sensor 1 Signal |
Knock Sensor (KS) Bank 2 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | D-BU | 1876 | Knock Sensor 2 Signal |
Manifold Absolute Pressure (MAP) Sensor Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | OG/BK | 469 | Low Reference |
| B | L-GN | 432 | MAP Sensor Signal |
| C | GY | 2704 | 5-Volt Reference |
Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | YE | 492 | MAF Sensor Signal |
| B | PK | 339 | Ignition 1 Voltage |
| C | BK/WH | 451 | Ground |
| D | TN | 472 | IAT Sensor Signal |
| E | BK | 2760 | Low Reference |
Secondary Air Injection (AIR) Control Solenoid Valve/Pressure Sensor Bank 2 Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | BK | 476 | Low Reference |
| 2 | WH | 5268 | Air Pressure Sensor |
| 3 | GY | 474 | 5-Volt Reference |
| 4 | BK/WH | 451 | Ground |
| 5 | - | - | Not Used |
| 6 | PU | 421 | Secondary Air Injection (AIR) Control Solenoid Valve Supply Voltage |
Secondary Air Injection (AIR) Pump Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | BK | 78 | AIR Pump Supply Voltage |
| B | BK | 1050 | Ground |
Secondary Air Injection (AIR) Pump Relay Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 30 | OG | 1540 | Battery Positive Voltage |
| 85 | PK | 339 | Ignition 1 Voltage |
| 86 | BN | 436 | Air Pump Relay Control |
| 87 | BK | 78 | AIR Pump Supply Voltage |
Secondary Air Injection (AIR) Valve Relay Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 30 | PK | 339 | Ignition 1 Voltage |
| 85 | PK | 339 | Ignition 1 Voltage |
| 86 | PK/BK | 429 | Air Solenoid Control |
| 87 | PU | 421 | Secondary Air Injection (AIR) Control Solenoid Valve Supply Voltage |
Supercharger Boost Control Solenoid (L32) Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A | PK | 339 | Ignition 1 Voltage |
| B | GY | 1724 | Boost Control Solenoid Control |
Throttle Actuator Control (TAC) Module Connector End View
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | TN | 1274 | 5-Volt Reference |
| 2 | PU | 1272 | Low Reference |
| 3 | L-BU | 1162 | APP Sensor 2 Signal |
| 4 | D-GN | 389 | Vehicle Speed Signal |
| 5 | - | - | Not Used |
| 6 | WH | 17 | Stop Lamp Switch Signal |
| 7 | OG/BK | 1061 | UART Serial Data Secondary |
| 8 | TN/WH | 551 | Ground |
| 9-10 | - | - | Not Used |
| 11 | D-BU | 1161 | APP Sensor 1 Signal |
| 12 | BN | 1271 | Low Reference |
| 13 | WH/BK | 1164 | 5-Volt Reference |
| 14-15 | - | - | Not Used |
| 16 | TN | 800 | UART Serial Data Primary |
| 17 | TN/WH | 551 | Ground |
| 18 | PK | 39 | Ignition 1 Voltage |
| 19-20 | - | - | Not Used |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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