Keep tabs on engine oil pressure with the Standard Ignition Engine Oil Pressure Switch / Choke Heater Pressure Switch PS-393. It drops in as a direct replacement that ensures OE fit on the 1977 Pontiac Ventura, 1977 Pontiac LeMans, 1977-1978 Pontiac Firebird, and 1989 GMC S15 (All engines), so installation is straightforward. This switch senses engine oil pressure and provides a reading to the vehicle's data monitoring system; it is cataloged under both the Engine Oil Pressure Switch and Choke Heater Pressure Switch names.
If a failed switch is the cause of an erratic warning light or an inaccurate oil pressure reading, this unit replaces it. Diagnose the cause before replacing.
Interchange: S365 · OP6614 · 549099
Manufacturer part number PS-393 (also PS393)
This part cross-references / interchanges with the following part numbers:
What does the PS-393 switch do?
It senses engine oil pressure and provides a reading to the vehicle's data monitoring system. It is listed under both the Engine Oil Pressure Switch and Choke Heater Pressure Switch names.
Which vehicles does this switch fit?
It is a direct-fit replacement for the 1977 Pontiac Ventura, 1977 Pontiac LeMans, 1977-1978 Pontiac Firebird, and 1989 GMC S15 (All engines). See the Buyer's Guide tab to confirm your vehicle.
What part numbers does the PS-393 interchange with?
It cross-references to S365, OP6614, and 549099. The manufacturer part number is PS-393.
What are signs this switch may need replacing?
An erratic or falsely-lit oil pressure warning light, an inaccurate gauge reading, or oil weeping from the switch can be signs. Diagnose the cause before replacing, since these symptoms have other possible sources.
How does it connect and where is it made?
It uses a single male button terminal with a female connector. Its country of origin is Mexico, and each unit is 100% tested to confirm specification compliance.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
