Walker 256-1008 Engine Oil Pressure Switch

Engine Oil Pressure Switch for OE-Style Monitoring

Walker 256-1008 is an OE replacement engine oil pressure switch built to monitor lubrication pressure and send a warning signal when pressure drops below safe limits. It is used in applications such as Chevrolet Silverado 1500, GMC Sierra 1500, and Buick LeSabre where accurate oil pressure feedback is needed for the dash light or engine control system.

• OE replacement oil pressure switch for factory-style operation
• Brass and plastic construction for engine-bay durability
• Pin terminal design with 1 female connector and 3 male terminals
• Matches OE pressure thresholds, thread size, and electrical response
• Direct-fit replacement for factory mounting locations

How It Works

This Walker oil pressure switch monitors engine oil pressure and communicates with the ECU or driver warning circuit when pressure falls below the expected range. The switch is built to match OE specifications so it threads into the original location, commonly the engine block or oil filter housing, and connects to the existing harness without modification. Part number 256-1008 is also referenced for related OE-style replacement needs across multiple GM and Dodge applications.

Compatible With 2003-2014 Chevrolet Express 1500, 2003-2014 GMC Savana 1500, 2003-2013 Chevrolet Silverado 1500, 2003-2013 GMC Sierra 1500, 2007 Chevrolet Silverado 1500 Classic, 2007 GMC Sierra 1500 Classic, 2000-2005 Buick LeSabre, 1997-2005 Buick Park Avenue, 2003-2005 Chevrolet Express 2500, 2003-2005 GMC Savana 2500, 2000-2005 Pontiac Bonneville, 1995-1996 Dodge Viper, and 1992-1994 Dodge Viper, For Light.

Common Problems It Can Address

• Oil pressure warning light flickering or staying on
• False low-oil-pressure alerts on the dash
• No signal to the ECU or gauge circuit
• Intermittent warning behavior from a worn switch
• Loss of reliable oil pressure monitoring after engine service

Installation Notes

Install the switch in the factory oil pressure port and verify the connector style before installation. Because this part uses OE-style thread and terminal specifications, it is designed to connect to the original wiring and mounting point on the vehicle. Confirm the application by year, make, and model before ordering, especially on Chevrolet Silverado 1500 and GMC Sierra 1500 trucks where multiple engine configurations may exist.

Quality Assurance

Walker Products manufactures this switch to OE replacement standards using high-temperature, oil-resistant materials for consistent electrical response in engine environments. The design focuses on accurate pressure monitoring and dependable fitment for service and repair work.