Buick / Opel / Chevrolet 8-Pin Fuel Pump Assembly Waterproof Connector – OEM 12176335
Direct OEM-specification replacement for the Delphi 8-pin waterproof wire harness connector used on fuel pump assemblies (in-tank fuel pump modules) across Buick, Opel, and Chevrolet GM platforms. Cross-references Delphi / GM OEM part number 12176335. Grey nylon and rubber housing with waterproof sealing — a high-density 8-pin connector that consolidates the fuel pump motor supply, fuel level sender signal, and fuel pressure regulator circuits into a single sealed connector at the top of the in-tank fuel pump module.
The 8-pin fuel pump assembly connector is located on top of the fuel tank, connecting the in-tank fuel pump module to the vehicle harness. It is exposed to fuel vapour, heat from the fuel tank, and vibration from the vehicle. A failed connector causes multiple simultaneous fuel system faults — the fuel pump may stop operating (causing a no-start or stall), the fuel level gauge may read empty or full regardless of actual fuel level, or the fuel pressure regulator may lose its control signal. The 8-pin design means a single connector failure can affect all fuel system functions simultaneously.
| OEM Number | Application |
|---|---|
| 12176335 | Delphi 8-pin fuel pump assembly connector (Buick / Opel / Chevrolet) |
| Pin Group | Function | Failure Symptom if Open |
|---|---|---|
| Pins 1–2 | Fuel pump motor power supply and ground (high-current) | Fuel pump inoperative, no-start or stall |
| Pins 3–4 | Fuel level sender signal and ground | Fuel gauge reads empty or full, inaccurate |
| Pins 5–6 | Fuel pressure regulator control | Fuel pressure fault, rich/lean running |
| Pins 7–8 | Fuel pump speed control / diagnostic | Fuel pump runs at fixed speed |
| Attribute | Detail |
|---|---|
| Pin Count | 8-Pin |
| Housing Material | Nylon and rubber (waterproof) |
| Housing Colour | Grey |
| Sealing | Waterproof (fuel vapour resistant) |
| OEM Part Number | 12176335 |
| Applications | In-tank fuel pump module, fuel level sender, fuel pressure regulator |
| Compatible Models | Buick LaCrosse / Regal / Excelle; Opel Astra / Insignia / Zafira; Chevrolet Cruze / Malibu / Equinox |
| Terminal Included | Yes |
Q: My Buick fuel gauge is stuck on empty and the car won’t start — could it be the fuel pump connector?
A: Yes. A failed 8-pin fuel pump assembly connector can simultaneously cause a no-start condition and an inaccurate fuel gauge reading. Inspect the connector (OEM 12176335) before replacing the fuel pump module or fuel level sender.
Q: Are terminals included?
A: Yes, terminals are included with all variants.
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8 Pin Connectors
