Gates 31748 Fuel Tank Cap

OE Equivalent Fuel Cap for Threaded Filler Necks

The Gates 31748 OE Equivalent Fuel Cap is built for direct replacement on a wide range of vehicles that use a threaded filler neck. It meets or exceeds OEM specifications and is engineered for shallow and deep cam filler necks with emission-control venting requirements.

For drivers servicing Chevrolet Silverado 2500 HD, Ford F-250 Super Duty, or Jeep Wrangler applications, this fuel tank cap provides an OE-style sealing solution that matches the original fit and function.

Key Features

• OE Equivalent Fuel Cap construction from Gates
• Meets or exceeds OEM specifications
• Fits shallow and deep cam filler necks
• Emission control venting design
• Threaded cam type for listed applications
• Non-lockable design
• OE performance comparison rating
• Part number 31748 for catalog and cross-reference use

Product Details

The Gates OE Equivalent Fuel Cap line is focused on OE-style replacement parts for fuel system service. Part number 31748 uses rugged, heavy-duty construction and is built to restore proper tank sealing on vehicles that require a threaded fuel cap with emission-control venting. With a shell diameter of 2.78 inches, thread diameter of 1.77 inches, and depth of 2.05 inches, it is specified for the listed fitments and applications.

This part cross-references Four Seasons 46144 for the same application.

Common Problems It Can Address

• Fuel cap warning light caused by a worn or leaking cap
• Fuel vapor loss from a damaged seal or poor cap fit
• Evaporative emissions system faults related to cap sealing
• Difficulty maintaining proper closure on threaded filler necks
• Replacement needs on high-mileage Chevrolet, Ford, GMC, Jeep, Nissan, and other listed vehicles

Installation Notes and Tips

Verify the filler neck style before ordering. This cap is listed for threaded filler neck applications and is not lockable. Confirm the vehicle’s year, make, and model against the fitment data, especially on Ford Super Duty, Chevrolet Express, GMC Savana, and Jeep Wrangler applications where filler neck configuration matters.

For best results, inspect the filler neck sealing surface for dirt, corrosion, or damage before installing the new cap. A clean sealing surface helps the cap seat correctly and supports proper emission-control sealing.

Quality Assurance

Gates OE Equivalent Fuel Caps are built to meet or exceed OEM specifications and are intended to deliver OE-style fit and function for the listed applications. Part number 31748 is part of Gates’ fuel system hardware lineup for direct replacement service.

• Fits 2013-2015 Chevrolet Silverado 2500 HD, N/A
• Fits 2013-2015 Chevrolet Silverado 3500 HD, N/A
• Fits 2013-2014 Chevrolet Express 2500, N/A
• Fits 1996-1998 Chevrolet Express 2500, N/A
• Fits 2013-2014 Chevrolet Express 3500, N/A
• Fits 1996-1998 Chevrolet Express 3500, N/A
• Fits 2014 GMC Savana 2500, N/A
• Fits 2010-2011 GMC Savana 2500, N/A
• Fits 1996-1998 GMC Savana 2500, N/A
• Fits 2014 GMC Savana 3500, N/A
• Fits 2010-2011 GMC Savana 3500, N/A
• Fits 1996-1998 GMC Savana 3500, N/A
• Fits 2014 GMC Sierra 2500 HD, N/A
• Fits 2014 GMC Sierra 3500 HD, N/A
• Fits 2008 Ford F-250 Super Duty, N/A
• Fits 1999-2005 Ford F-250 Super Duty, N/A
• Fits 2008 Ford F-350 Super Duty, N/A
• Fits 1999-2005 Ford F-350 Super Duty, N/A
• Fits 2006-2007 Ford F-250 Super Duty, N/A
• Fits 2006-2007 Ford F-350 Super Duty, N/A
• Fits 1997-2001 Jeep Wrangler, N/A
• Fits 1992-1995 Jeep Wrangler, N/A
• Fits 1993-2000 Nissan Pathfinder, N/A
• Fits 1992-2000 Nissan Maxima, N/A