Engine Oil Pressure Switch

Part Number 256-1001 (100346634)

UPC: 724620053498

Package contents: 1 Each per Box

Select vehicle for guaranteed fit

Color

$39.80

In stockShips by 5th Nov

Description

Walker Products Engine Oil Pressure Switches are OE Replacement components engineered to monitor oil pressure and alert the ECU or driver when levels fall below safe limits. These switches serve as critical warning devices that activate dashboard lights or feed signals to engine control systems when oil pressure drops, helping prevent severe internal damage due to lack of lubrication. Common symptoms of failure include oil light flickering, false warnings, or lack of signal under actual low-pressure conditions. Walker switches are manufactured to match OE specifications for pressure thresholds, thread size, terminal type, and electrical response. Each unit is built with high-temperature and oil-resistant materials to ensure consistent performance under prolonged engine exposure. Designed for exact OE fit, these switches thread directly into the factory location—typically the engine block or oil filter housing—and connect to existing wiring with no modifications. Whether used as part of a scheduled service, drivability repair, or engine rebuild, Walker Oil Pressure Switches provide dependable pressure monitoring and help extend engine life by maintaining early warning functionality within the lubrication system.

Fitment

This part fits the following vehicles.

Buick

2008 LaCrosse
2004-2007 Rainier

Cadillac

2004-2007 CTS
2002-2008 Escalade
2003-2008 Escalade ESV
2002-2008 Escalade EXT

Chevrolet

2007-2008 Avalanche
2003-2006 Avalanche 1500
1997-2008 Corvette
2003-2008 Express 1500
2003-2008 Express 2500
2003-2008 Express 3500
2006-2008 Impala
2006-2007 Monte Carlo
2003-2008 Silverado 1500
2007 Silverado 1500 Classic
2003, 2005-2006 Silverado 1500 HD
2007 Silverado 1500 HD Classic
2003-2004 Silverado 2500
2003-2008 Silverado 2500 HD
2007 Silverado 2500 HD Classic
2003-2006 Silverado 3500
2007 Silverado 3500 Classic
2007-2008 Silverado 3500 HD
2003-2006 SSR
2003-2008 Suburban 1500
2003-2008 Suburban 2500
2003-2008 Tahoe
2006-2008 Trailblazer
2003-2006 Trailblazer EXT

GMC

2005-2008 Envoy
2003-2006 Envoy XL
2004-2005 Envoy XUV
2003-2008 Savana 1500
2003-2008 Savana 2500
2003-2008 Savana 3500
2003-2008 Sierra 1500
2007 Sierra 1500 Classic
2003, 2005-2006 Sierra 1500 HD
2007 Sierra 1500 HD Classic
2003-2004 Sierra 2500
2003-2008 Sierra 2500 HD
2007 Sierra 2500 HD Classic
2003-2006 Sierra 3500
2007 Sierra 3500 Classic
2007-2008 Sierra 3500 HD
2003-2008 Yukon
2003-2008 Yukon XL 1500
2003-2008 Yukon XL 2500

Hummer

2003-2008 H2
2008 H3

Isuzu

2003-2006 Ascender

Pontiac

2008-2009 G8
2005-2008 Grand Prix
2004-2006 GTO

Saab

2005-2008 9-7x

Features & benefits

Prevents Engine Damage: Helps protect vital components by alerting the driver or system to low oil pressure conditions.
OE Replacement Calibration: Matches original specs for pressure activation point, thread pitch, and electrical response.
Monitors Oil Pressure Levels: Activates dashboard warning or ECU input when oil pressure falls below safe operating thresholds.
Engineered for Harsh Conditions: Built to resist high temperatures, oil exposure, and vibration in demanding engine environments.
Exact OE Fit: Installs directly in the factory location using original threads and connectors—no modifications required.

Specifications

Color	Black
Connector Gender	Female
Connector Quantity	1
Connector Shape	Circle
Country Of Origin	CN
Grade Type	Standard Replacement
Length	50.00
Material	Steel
Street Legal	Yes
Terminal Gender	Male
Terminal Quantity	3
Terminal Type	Blade Pin

Warranty

1 Year

Magnuson-Moss Warranty Act

Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)).