Walker 256-1039 Engine Oil Pressure Switch

Engine Oil Pressure Monitoring

Walker 256-1039 is an OE replacement engine oil pressure switch built to monitor lubrication pressure and send a signal to the ECU or dashboard warning system when pressure drops below safe limits. It is a direct-fit solution for vehicles such as the Chevrolet Malibu, Chevrolet Equinox, and GMC Terrain that rely on accurate oil pressure feedback for engine protection.

Built with metal and plastic construction, a black finish, and a blade pin terminal layout, this switch is made to match factory electrical response, thread size, and pressure threshold requirements. Walker 256-1039 installs in the original switch location and connects to the existing female connector without modification.

Key Features

• OE replacement engine oil pressure switch
• Metal and plastic construction for engine-bay durability
• Black housing with 1 blade pin terminal
• 1 female connector and 1 male terminal
• Direct-fit design for factory-style installation
• Built to match OE pressure thresholds and electrical response
• Part number: 256-1039

Detailed Description

Walker Products 256-1039 is engineered for accurate oil pressure monitoring in a wide range of GM and Saab applications. It threads into the factory mounting point, typically on the engine block or oil filter housing, and provides the signal needed to trigger the oil warning light or communicate pressure status to the engine control system. For drivers diagnosing oil light flicker, false warnings, or a missing warning signal during a real low-pressure condition, this switch addresses the source of the fault rather than the symptom.

Compatible With 2010-2017 Chevrolet Equinox, 2010-2017 GMC Terrain, 2004-2014 Chevrolet Malibu, and other listed applications, Walker 256-1039 supports accurate lubrication-system monitoring across multiple platforms. The part number 256-1039 is also a useful reference when verifying replacement fitment for service work, drivability repairs, or engine rebuilds.

Common Issues This Part Can Address

• Oil pressure warning light flickering or staying on
• False low-oil-pressure alerts
• No warning signal when oil pressure is actually low
• Faulty oil pressure switch electrical response
• Intermittent gauge or ECU oil pressure input issues

Installation Notes and Tips

Install the switch in the original factory location and confirm the connector style, terminal type, and thread specification before replacement. Inspect the wiring connector for corrosion, damaged terminals, or oil intrusion before connecting the new unit. After installation, verify proper oil pressure with a mechanical test if the engine has shown low-pressure symptoms, then confirm the warning light or control-system signal operates normally.

Quality Assurance

Walker Products manufactures this oil pressure switch to OE replacement standards, with attention to pressure threshold, terminal configuration, and electrical response. High-temperature and oil-resistant materials are used to support consistent operation in engine environments. Part number 256-1039 is built for direct-fit service on the listed applications.

This part cross-references AC Delco (e.g., D1846A) for the same application.

• Fits 2011-2017 Buick Regal, N/A
• Fits 2012-2017 Buick Verano, N/A
• Fits 2010-2017 Chevrolet Equinox, N/A
• Fits 2010-2017 GMC Terrain, N/A
• Fits 2010-2016 Buick LaCrosse, N/A
• Fits 2012-2015 Chevrolet Captiva Sport, N/A
• Fits 2014 Chevrolet Impala, N/A
• Fits 2004-2014 Chevrolet Malibu, N/A
• Fits 2006-2011 Chevrolet HHR, N/A
• Fits 2003-2011 Saab 9-3, N/A
• Fits 2010-2011 Saab 9-3X, N/A
• Fits 2011 Saab 9-5, N/A
• Fits 2005-2010 Chevrolet Cobalt, N/A
• Fits 2006-2010 Pontiac G6, N/A
• Fits 2007-2010 Saturn Sky, N/A
• Fits 2002-2010 Saturn Vue, N/A
• Fits 2007-2009 Pontiac G5, N/A
• Fits 2006-2009 Pontiac Solstice, N/A
• Fits 2007-2009 Saturn Aura, N/A
• Fits 2003-2007 Saturn Ion, N/A
• Fits 2002-2005 Chevrolet Cavalier, N/A
• Fits 2004-2005 Chevrolet Classic, N/A
• Fits 2002-2005 Pontiac Grand Am, N/A
• Fits 2002-2005 Pontiac Sunfire, N/A
• Fits 2002-2004 Oldsmobile Alero, N/A
• Fits 2004 Saturn L300, N/A
• Fits 2000 Saturn LS, N/A
• Fits 2000 Saturn LS1, N/A
• Fits 2000 Saturn LW1, N/A