GM 1-Pin Pressure Switch Connector – OEM 15345499 / 12176800 | Chevrolet Buick
Direct OEM-specification replacement for the GM 1-pin pressure switch connector used on oil pressure switches and A/C pressure switches. Cross-references OEM part numbers 15345499 and 12176800. Available bare or with 15cm pre-wired leads.
| OEM Number | Application |
|---|---|
| 15345499 | GM pressure switch connector — primary |
| 12176800 | GM pressure switch connector — alternate |
| Pin | Function | Failure Symptom if Corroded |
|---|---|---|
| 1 | Switch signal to ECU / BCM (normally open or closed) | P0520 / P0522 (oil pressure), A/C compressor not engaging |
| Attribute | Detail |
|---|---|
| Pin Count | 1-Pin |
| OEM Part Numbers | 15345499 / 12176800 |
| Housing Material | Nylon (PA66) |
| Wire Option | Bare connector / 15cm pre-wired leads |
| Application | Oil pressure switch, A/C pressure switch harness |
| Compatible Brands | Chevrolet, Buick, GMC, Cadillac |
| Code | Description |
|---|---|
| P0520 | Engine oil pressure sensor/switch — circuit malfunction |
| P0521 | Engine oil pressure sensor/switch — range/performance |
| P0522 | Engine oil pressure sensor/switch — circuit low |
Q: My GM oil pressure warning light is on but oil level is fine — is it the connector?
A: Yes. A corroded 1-pin oil pressure switch connector causes the ECU to read an open circuit, which it interprets as zero oil pressure. The oil pressure warning illuminates even with correct oil level and pressure. Inspect the connector before replacing the oil pressure switch or adding oil.
Q: Are terminals included?
A: Yes, terminals are included with all variants.
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