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 MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 678 (ENGINE CONTROLS - 4.3L - INTRODUCTION (2 OF 2))COMPONENT LOCATORENGINE CONTROLS CONNECTOR END VIEWSCENTRAL SEQUENTIAL FUEL INJECTION (CENTRAL SFI)
2006 Chevrolet Suburban C2500, 6.0 U
Central Sequential Fuel Injection (Central SFI)
2006 Chevrolet Suburban C2500, 6.0 USECTION Central Sequential Fuel Injection (Central SFI)
WARNING: This page is about a different car, the 2006 GMC Sierra and 2006 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Central Sequential Fuel Injection (Central SFI)
Connector Part Information
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| Pin | Wire Color | Circuit No. | Function |
| A | BK/WH | 845 | Fuel Injector 5 Control |
| B | PK | 1039 | Ignition 1 Voltage |
| C | PK/BK | 1746 | Fuel Injector 3 Control |
| D | PK | 1039 | Ignition 1 Voltage |
| E | PK | 1039 | Ignition 1 Voltage |
| F | BK | 1744 | Fuel Injector 1 Control |
| G | L-GN/BK | 1745 | Fuel Injector 2 Control |
| H | PK | 1239 | Ignition 1 Voltage |
| J | PK | 1239 | Ignition 1 Voltage |
| K | L-BU/BK | 844 | Fuel Injector 4 Control |
| L | PK | 1239 | Ignition 1 Voltage |
| M | YE/BK | 846 | Fuel Injector 6 Control |
RENDER: 1.0x
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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.