Keep an eye on engine lubrication with the Walker Products Engine Oil Pressure Switch 256-1008, an OE Replacement component that monitors oil pressure and signals the driver or ECU when levels fall below safe operating thresholds. It's a direct-fit replacement for a wide range of applications, including the 2000-2005 Buick LeSabre, 1997-2005 Buick Park Avenue, 2003-2014 Chevrolet Express 1500, 2003-2013 Chevrolet Silverado 1500, 1995-1996 Dodge Viper, 2003-2014 GMC Savana 1500, 2003-2013 GMC Sierra 1500, and 2000-2005 Pontiac Bonneville — see the "Vehicles it fits" section for the full list and engine coverage.
- Monitors Oil Pressure Levels: Activates the dashboard warning or ECU input when oil pressure drops below safe operating thresholds.
- OE Replacement Calibration: Matches the original specs for pressure activation point, thread pitch, and electrical response.
- Built for Harsh Conditions: Made with high-temperature and oil-resistant materials to resist heat, oil exposure, and vibration.
- Exact OE Fit: Threads into the factory location — typically the engine block or oil filter housing — and connects to existing wiring with no modifications.
Common signs the original switch may need replacing include a flickering oil light, false warnings, or no signal under actual low-pressure conditions. If a failed switch is the cause, this unit restores early low-oil warning within the lubrication system.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
What does this oil pressure switch do?
It monitors engine oil pressure and activates the dashboard warning light or feeds a signal to the ECU when pressure falls below safe operating thresholds.
Is the Walker 256-1008 a direct replacement?
Yes. It's an OE Replacement switch that threads into the factory location and connects to existing wiring with no modifications required.
What are signs my oil pressure switch may be failing?
Common symptoms include a flickering oil light, false warnings, or no signal under actual low-pressure conditions. Diagnose the cause before replacing.
Where does this switch install?
It threads directly into the factory location, typically the engine block or oil filter housing, using the original threads and connector.
Will this fit my vehicle?
It fits many applications such as the Buick LeSabre, Chevrolet Silverado 1500, GMC Sierra 1500, and Dodge Viper. Check the "Vehicles it fits" section to confirm your exact year, make, model, and engine.
