Walker 256-1002 Engine Oil Pressure Switch

Engine Oil Pressure Switch for GM Applications

Walker Products 256-1002 is an engine oil pressure switch built for select Chevrolet, GMC, Cadillac, Buick, Pontiac, Saturn, and Saab applications. It is a direct-fit replacement for vehicles such as the Chevrolet Colorado, GMC Canyon, Cadillac CTS, and Chevrolet Camaro where accurate oil pressure signal control is required.

Key Features

• Engine oil pressure switch for select GM and Saab vehicles
• Walker Products 256-1002 replacement part number
• Built to meet or exceed OEM standards and specifications
• Supported by Walker Products engineering, product management, and technical documentation
• Compatible with a wide range of 2004-2016 vehicle applications

Product Details

Walker Products has supplied fuel system and engine management components since 1946, with manufacturing and quality systems focused on accurate vehicle application coverage and OE-style performance. The Walker Products line includes engine sensors and related management parts, and this oil pressure switch follows that same approach for dependable replacement service. Part number 256-1002 is listed for multiple GM platforms, including Cadillac CTS, Chevrolet Impala, Chevrolet Malibu, Pontiac G6, Saturn Vue, and other covered models.

This part cross-references Standard Ignition PS-425 and PS629 for the same application.

What This Part Helps Address

• Oil pressure warning light staying on or coming on intermittently
• Incorrect oil pressure signal to the gauge or engine control system
• Fault codes related to oil pressure switch circuit performance
• Hard-to-diagnose drivability issues tied to oil pressure input
• Replacement needs on aging GM and Saab engine management systems

Installation Notes and Tips

• Verify the connector style and thread/application match before installation.
• Inspect the oil pressure circuit and related wiring for damage or contamination.
• Confirm the vehicle’s exact year, make, and model against the fitment list before ordering.
• Fits 2015-2016 Chevrolet Colorado, N/A.
• Fits 2015-2016 GMC Canyon, N/A.
• Fits 2013-2015 Cadillac ATS, N/A.
• Fits 2006-2015 Cadillac CTS, N/A.
• Fits 2013-2015 Chevrolet Camaro, N/A.
• Fits 2011-2012 Chevrolet Camaro, N/A.
• Fits 2011 Buick Lucerne, N/A.
• Fits 2004-2011 Cadillac SRX, N/A.
• Fits 2011 Cadillac STS, N/A.
• Fits 2006-2011 Chevrolet Impala, N/A.
• Fits 2011 Saab 9-5, N/A.
• Fits 2009-2010 Buick Lucerne, N/A.
• Fits 2005-2010 Cadillac STS, N/A.
• Fits 2006-2010 Chevrolet Malibu, N/A.
• Fits 2006-2010 Pontiac G6, N/A.
• Fits 2010 Saab 9-5, N/A.
• Fits 2008-2010 Saturn Vue, N/A.
• Fits 2006-2009 Chevrolet Uplander, N/A.
• Fits 2008-2009 Pontiac G8, N/A.
• Fits 2006-2009 Pontiac Montana, N/A.
• Fits 2006-2009 Saab 9-3, N/A.
• Fits 2005-2008 Buick Allure, N/A.
• Fits 2005-2008 Buick LaCrosse, N/A.
• Fits 2007-2008 Saturn Aura, N/A.
• Fits 2006-2007 Buick Terraza, N/A.
• Fits 2006-2007 Chevrolet Monte Carlo, N/A.
• Fits 2007 Saturn Relay, N/A.
• Fits 2004-2006 Buick Rendezvous, N/A.
• Fits 2006 Saturn Relay, N/A.
• Fits 2004-2005 Cadillac CTS, N/A.

Quality Assurance

Walker Products manufactures engine management components to meet or exceed OEM standards and specifications. The company supports production with in-house engineering, product management, and technical documentation, and operates as an ISO 9001/IATF16949 certified manufacturer.