Mahle B31872 Engine Oil Cooler Gasket

Engine Oil Cooler Gasket for GM Applications

The Mahle B31872 engine oil cooler gasket is an OEM-standard sealing solution built with molded rubber for a precise seal at the oil cooler interface. It is designed for dual round port, metal-with-molded-rubber applications found across a wide range of Chevrolet, GMC, Cadillac, Buick, Pontiac, Hummer, Saab, Isuzu, and related GM vehicles.

Mahle gaskets are trusted by OEMs and technicians for dependable sealing performance, and this part number B31872 follows that same OE-style approach for service work on vehicles such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade.

Key Features

• Molded rubber gasket material for a formed seal
• OEM Standard item grade
• Engine oil cooler gasket for dual round port designs
• Built for metal with molded rubber sealing surfaces
• Fits a broad range of GM trucks, SUVs, and performance cars
• Mahle part number B31872

Detailed Description

Mahle B31872 is an engine oil cooler gasket intended for GM platforms that use a dual round port configuration. This gasket is listed across many fitments from 1997 through 2016, including Chevrolet Corvette, Camaro, Silverado 1500, Express 2500, GMC Sierra 1500, Yukon, Cadillac CTS, and Escalade. The molded rubber construction helps provide a consistent seal at the oil cooler connection, which is important when servicing oil system components that must remain clean and leak-free.

This part cross-references FEL-PRO 72462 and General Motors 15203889 for the same application. If you are replacing a leaking oil cooler seal on a Chevrolet Silverado 2500 HD, GMC Savana 3500, or Cadillac Escalade EXT, B31872 offers an OE-style replacement path with the correct fitment profile.

What This Part Helps Address

• Oil seepage at the engine oil cooler connection
• Sealing issues after oil cooler service
• Leak paths caused by worn or flattened gasket material
• Maintenance on dual round port oil cooler assemblies
• Replacement of damaged GM oil cooler seals

Installation Notes and Tips

Confirm the vehicle uses a dual round port, metal with molded rubber oil cooler setup before installation. Clean the mating surfaces thoroughly and inspect the cooler and housing for scoring, corrosion, or distortion that could affect sealing. Match the application by vehicle year, make, and model, and verify the part number B31872 against the original gasket before reassembly.

• Fits 2003-2016 Chevrolet Express 2500, N/A
• Fits 2003-2016 Chevrolet Express 3500, N/A
• Fits 2001-2016 Chevrolet Silverado 2500 HD, N/A
• Fits 2007-2016 Chevrolet Silverado 3500 HD, N/A
• Fits 2003-2016 GMC Savana 2500, N/A
• Fits 2003-2016 GMC Savana 3500, N/A
• Fits 2002-2016 GMC Sierra 2500 HD, N/A
• Fits 2007-2016 GMC Sierra 3500 HD, N/A
• Fits 2010-2015 Chevrolet Camaro, N/A
• Fits 1998-2002 Chevrolet Camaro, N/A
• Fits 2011-2015 Chevrolet Caprice, N/A
• Fits 2002-2014 Cadillac Escalade, N/A
• Fits 2003-2014 Cadillac Escalade ESV, N/A
• Fits 1997-2014 Chevrolet Corvette, N/A
• Fits 2003-2014 Chevrolet Express 1500, N/A
• Fits 1999-2014 Chevrolet Silverado 1500, N/A
• Fits 2002-2014 Chevrolet Tahoe, N/A
• Fits 2003-2014 GMC Savana 1500, N/A
• Fits 1999-2014 GMC Sierra 1500, N/A
• Fits 2002-2014 GMC Yukon, N/A
• Fits 2002-2014 GMC Yukon XL 1500, N/A
• Fits 2009-2013 Cadillac CTS, N/A
• Fits 2004-2007 Cadillac CTS, N/A
• Fits 2002-2013 Cadillac Escalade EXT, N/A
• Fits 2007-2013 Chevrolet Avalanche, N/A
• Fits 2002-2013 Chevrolet Suburban 2500, N/A
• Fits 2002-2013 GMC Yukon XL 2500, N/A
• Fits 2009-2012 Chevrolet Colorado, N/A
• Fits 2009-2012 GMC Canyon, N/A
• Fits 2008-2010 Hummer H3, N/A
• Fits 2009-2010 Hummer H3T, N/A
• Fits 2008-2009 Buick Allure, N/A
• Fits 2008-2009 Buick LaCrosse, N/A
• Fits 2006-2009 Chevrolet Impala, N/A
• Fits 2009 Chevrolet Suburban 1500, N/A
• Fits 2002-2006 Chevrolet Suburban 1500, N/A
• Fits 2006-2009 Chevrolet Trailblazer, N/A
• Fits 2005-2009 GMC Envoy, N/A
• Fits 2003-2009 Hummer H2, N/A
• Fits 2008-2009 Pontiac G8, N/A
• Fits 2005-2009 Saab 9-7x, N/A
• Fits 2005-2008 Pontiac Grand Prix, N/A
• Fits 2004-2007 Buick Rainier, N/A
• Fits 2006-2007 Chevrolet Monte Carlo, N/A
• Fits 2007 Chevrolet Silverado 1500 Classic, N/A
• Fits 2007 Chevrolet Silverado 1500 HD Classic, N/A
• Fits 2007 Chevrolet Silverado 2500 HD Classic, N/A
• Fits 2007 Chevrolet Silverado 3500 Classic, N/A
• Fits 2007 GMC Sierra 1500 Classic, N/A
• Fits 2007 GMC Sierra 1500 HD Classic, N/A
• Fits 2007 GMC Sierra 2500 HD Classic, N/A
• Fits 2007 GMC Sierra 3500 Classic, N/A
• Fits 2002-2006 Chevrolet Avalanche 1500, N/A
• Fits 2005-2006 Chevrolet Silverado 1500 HD, N/A
• Fits 2001-2003 Chevrolet Silverado 1500 HD, N/A
• Fits 2001-2006 Chevrolet Silverado 3500, N/A
• Fits 2003-2006 Chevrolet SSR, N/A
• Fits 2003-2006 Chevrolet Trailblazer EXT, N/A
• Fits 2003-2006 GMC Envoy XL, N/A
• Fits 2005-2006 GMC Sierra 1500 HD, N/A
• Fits 2001-2003 GMC Sierra 1500 HD, N/A
• Fits 2001-2006 GMC Sierra 3500, N/A
• Fits 2003-2006 Isuzu Ascender, N/A
• Fits 2004-2006 Pontiac GTO, N/A
• Fits 2004-2005 GMC Envoy XUV, N/A
• Fits 1999-2004 Chevrolet Silverado 2500, N/A
• Fits 1999-2004 GMC Sierra 2500, N/A
• Fits 1998-2002 Pontiac Firebird, N/A

Quality Assurance

Mahle supplies sealing products used by OEMs and professional technicians worldwide, and B31872 is built to OEM Standard for service replacement on the listed GM applications. The molded rubber design supports consistent sealing performance when the correct oil cooler configuration is verified.