Gates 31843 Fuel Tank Cap

OE Equivalent Fuel Cap for GM Applications

The Gates 31843 OE Equivalent Fuel Cap is built for direct replacement on a wide range of Chevrolet, GMC, Cadillac, Buick, Pontiac, Saturn, and related applications. It is an OE Performance fuel tank cap made for vacuum-only systems and is shaped to match shallow and deep cam filler necks.

For drivers servicing a Chevrolet Silverado, GMC Sierra, or Cadillac Escalade, this cap provides an OE-style sealing solution that matches the original fit and function requirements.

Key Features

• OE Equivalent Fuel Cap design for factory-style replacement
• Vacuum-only venting for supported fuel systems
• Quick-On cam type for proper filler neck engagement
• Fits both shallow and deep cam filler necks
• Heavy-duty construction for everyday service use
• OE Performance comparison rating
• Thread diameter: 2.04 in.
• Shell diameter: 2.75 in.
• Depth: 1.56 in.
• Not lockable

Product Details

Gates OE Equivalent Fuel Caps are engineered to meet or exceed OEM specifications, giving you a direct-fit replacement for worn, missing, or damaged fuel caps. Part number 31843 is designed for vacuum-only systems and is listed for a broad range of GM vehicles, including Chevrolet Aveo, Impala, Silverado, Tahoe, GMC Sierra, Yukon, and Cadillac Escalade applications. This part cross-references Wix 46198 for the same application.

Because the cap is built around OE-style dimensions and cam engagement, it helps maintain the correct seal at the filler neck while matching the original service requirements of the vehicle.

Common Problems This Fuel Cap Can Address

• Check engine light caused by a loose or failing fuel cap seal
• Fuel vapor leakage from a worn cap gasket or sealing surface
• Improper closure on Quick-On filler neck designs
• Replacement need after a lost, cracked, or damaged cap
• Fitment issues on shallow or deep cam filler necks

Installation Notes and Fitment

Install the cap by aligning it with the Quick-On filler neck and turning until it seats securely. Confirm that the vehicle uses a vacuum-only fuel cap and that the filler neck style matches the application notes. Fits 2004-2012 Chevrolet Colorado, N/A; Fits 2004-2012 Chevrolet Malibu, N/A; Fits 2005-2012 GMC Yukon, N/A; Fits 2005-2012 Cadillac Escalade, N/A; Fits 2007-2013 Chevrolet Corvette, N/A; Fits 2004-2011 GMC Savana 1500, N/A; Fits 2006-2011 Chevrolet HHR, N/A; Fits 2007-2010 GMC Acadia, N/A.

Additional fitment coverage includes many 2002-2018 Chevrolet, GMC, Buick, Cadillac, Pontiac, Saturn, Suzuki, Isuzu, Hummer, Saab, and Mitsubishi models listed for the same OE Equivalent Fuel Cap application. Verify the filler neck configuration and notes before installation, especially on vehicles marked without a threaded filler neck.

Quality Assurance

Gates designs this fuel cap to OE-equivalent standards with rugged, heavy-duty construction and an OE Performance rating. The part is built to meet or exceed OEM specifications for the listed applications.