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.
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HOMESERVICE MANUALSCHEVROLET2006IMPALA LTZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 2 (ENGINE CONTROL SYSTEM - 5.3L - INTRODUCTION (2 OF 2))VISUAL IDENTIFICATIONENGINE CONTROL MODULE (ECM) CONNECTORSENGINE CONTROL MODULE (ECM) C3
2006 Chevrolet Impala LTZ
Engine Control Module (ECM) C3
2006 Chevrolet Impala LTZSECTION Engine Control Module (ECM) C3
WARNING: This page is about a different variant/trim than selected.
Engine Control Module (ECM) Connector End Views
Connector Part InformationÂ
|
Terminal Part InformationÂ
|
Engine Control Module (ECM) C3
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| 1 | - | - | Not Used |
| 2 | BN | 2391 | HO2S Heater Low Control [- Bank 1 Sensor 2] |
| 3-5 | - | - | Not Used |
| 6 | OG | 6030 | Brake Booster Vacuum Signal |
| 7-10 | - | - | Not Used |
| 11 | YE | 492 | MAF Sensor Signal |
| 12-14 | - | - | Not Used |
| 15 | GY | 6031 | 5-Volt Reference 1 |
| 16-17 | - | - | Not Used |
| 18 | TN/WH | 1669 | HO2S Low Signal [- Bank 1 Sensor X] |
| 19 | PU/WH | 1668 | HO2S High Signal [- Bank 1 Sensor X] |
| 20-21 | - | - | Not Used |
| 22 | OG/BK | 1786 | Park/Neutral Signal |
| 23 | - | - | Not Used |
| 24 | TN | 2760 | Low Reference |
| 25-33 | - | - | Not Used |
| 34 | TN | 472 | IAT Sensor Signal |
| 36 | YE/BK | 6032 | Low Reference |
| 37-44 | - | - | Not Used |
| 45 | OG | 381 | Vehicle Speed Signal |
| 46-48 | - | - | Not Used |
| 49 | TN | 2759 | Low Reference |
| 50 | - | - | Not Used |
| 51 | D-GN/WH | 459 | A/C Compressor Clutch Relay Control |
| 52-56 | - | - | Not Used |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.