4-Pin 1.5mm Waterproof Connector OEM 15326423 / 12176896 – Delphi GM Chevrolet Buick
Direct OEM-specification replacement for the Delphi 4-pin 1.5mm waterproof connector used across multiple GM, Chevrolet, and Buick sensor and actuator harness applications. Cross-references Delphi/GM OEM numbers 15326423 and 12176896. This connector is used on camshaft position sensors, MAF sensors, and various actuator harnesses across the GM global platform — a corroded connector is a frequent cause of P0340, P0365, and P0101 faults that are often misdiagnosed as failed sensors.
| OEM Number | Manufacturer | Application |
|---|---|---|
| 15326423 | Delphi / GM | 4-pin 1.5mm waterproof sensor connector – primary |
| 12176896 | Delphi / GM | Alternate cross-reference – same housing |
| Pin | Function | Typical Wire Color | Failure Symptom if Open/Corroded |
|---|---|---|---|
| A | Sensor power (+5V or +12V reference) | Pink | No sensor output; P0340 / P0365 |
| B | Sensor signal output | Purple/White | Erratic cam signal; misfire / no-start |
| C | Sensor ground | Black/White | Signal offset; P0341 / P0366 |
| D | Shield / additional ground | Black | Noise on signal; intermittent fault |
| Attribute | Detail |
|---|---|
| Pin Count | 4-Pin |
| Terminal Pitch | 1.5mm (Delphi Metri-Pack 150 series) |
| OEM Numbers | 15326423 / 12176896 |
| Housing Material | PA66 nylon, waterproof sealed |
| Sealing | Individual wire seals + secondary lock |
| Application | CMP sensor, MAF sensor, actuator harness |
| Compatible Brands | GM, Chevrolet, Buick, Cadillac (select models) |
| Code | Description |
|---|---|
| P0340 | Camshaft Position Sensor A Circuit (Bank 1) |
| P0341 | Camshaft Position Sensor A Circuit Range/Performance |
| P0365 | Camshaft Position Sensor B Circuit (Bank 1) |
| P0101 | Mass Air Flow Sensor Circuit Range/Performance |
Q: My Chevrolet has P0340 — is it the cam sensor or the connector?
A: P0340 on GM/Chevrolet is frequently caused by a corroded 4-pin connector rather than a failed sensor. Before replacing the sensor, disconnect the 15326423 connector and inspect for green corrosion or bent pins. Clean with electrical contact cleaner, reconnect, and clear codes — if P0340 does not return, the connector was the fault.
Q: What is the difference between 15326423 and 12176896?
A: Both are Delphi/GM part numbers for the same 4-pin 1.5mm waterproof housing. 15326423 is the primary GM service part number; 12176896 is an earlier or alternate catalog reference for the same connector. They are fully interchangeable.
Q: Are terminals included?
A: Yes, Delphi Metri-Pack 150 series terminals and wire seals are included with all variants.
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4 Pin Connectors
