NOS Sorensen PS-78 Oil Pressure Switch – USA Made
Description:
Correct for 1965–72 GM platforms using Delco-style senders. Cross-referenced with GP Sorensen OPS78, Standard PS-15, and Delco D1802. Short stem, single terminal – activates warning light at low oil pressure. NOS condition – includes original packaging – not a reproduction.
⚙️ Part Overview
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Manufacturer: Sorensen (Standard Motor Products)
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Part Number: PS-78
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Type: Oil pressure switch
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Design: Single terminal, short stem, threaded body
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Function: Activates warning light when oil pressure drops below threshold
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Country of Origin: USA
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Packaging: Typically boxed; NOS units may appear sealed or shelf-worn
🚗 Fitment & Specific Applications
The PS-78 is correct for GM platforms from the mid-1960s through early 1970s, especially those using Delco-style senders in warning light circuits. Based on verified listings and interchange data:
| Make | Models (Typical) | Years | Engine Types |
|---|---|---|---|
| Chevrolet | Impala, Chevelle, Camaro | 1965–1972 | 283, 327, 350 V8 |
| GMC | C/K Series Trucks | 1966–1973 | Small-block V8 |
| Buick | Skylark, Special | 1966–1972 | Nailhead & small-block V8 |
| Pontiac | Tempest, LeMans | 1967–1972 | V8 platforms |
This switch is typically mounted near the oil filter boss or rear block port and used in warning light—not gauge—systems.
🔁 Cross-Reference Numbers
| Brand | Part Number |
|---|---|
| Sorensen | PS-78 |
| GP Sorensen | OPS78 / OPS-78 |
| Niehoff | DR-133B |
| Standard | PS-15 |
| Delco | D1802 |
| Borg Warner | S320 |
| NAPA Echlin | OP9X |
These interchange numbers reflect compatibility across multiple aftermarket brands for short-stem GM-style oil pressure switches【4†】.
