Gates 31732 Fuel Tank Cap

OE Equivalent Fuel Cap for Classic GM and Mopar Applications

The Gates 31732 is an OE Equivalent Fuel Cap built with rugged, heavy-duty construction for dependable fuel tank sealing. It meets or exceeds OEM specifications and is designed for deep cam filler necks with non-vented operation.

Gates OE Equivalent Fuel Cap line focuses on direct-replacement fuel system hardware that matches original-style fit and function. For restorations and maintenance on vehicles such as the Chevrolet Impala, Pontiac GTO, and Oldsmobile Cutlass, this fuel cap supports the correct OE-style service approach.

• OE Equivalent Fuel Cap design for original-style replacement
• Non-vented construction
• Deep cam filler neck fitment
• Rugged, heavy-duty construction
• Meets or exceeds OEM specifications
• Thread diameter: 1.38 in.
• Shell diameter: 2.41 in.
• Depth: 1.34 in.
• OE performance rating

Detailed Product Overview

Gates part number 31732 is a non-lockable fuel tank cap engineered for OE-style service on a wide range of classic domestic vehicles. It is listed for 1964-1970 applications including the Buick LeSabre, Chevrolet Impala, Cadillac DeVille, Pontiac Grand Prix, and Oldsmobile 98, with notes for specific body styles and emission configurations. This part cross-references Four Seasons 46112 for the same application.

Because this cap is non-vented and built for deep cam filler necks, it is suited to vehicles that require a direct replacement fuel cap with the correct sealing profile. The Gates 31732 is a practical choice when restoring fuel system integrity on a Chevrolet Impala, Pontiac GTO, or Cadillac Fleetwood.

What This Fuel Cap Helps Address

• Loose or worn fuel cap sealing
• Fuel vapor loss from a non-vented cap application
• Incorrect fit on deep cam filler necks
• Replacement needs for aging OE-style fuel tank caps
• Service issues on classic Buick, Chevrolet, Cadillac, Pontiac, Chrysler, Dodge, Ford, Lincoln, Mercury, and Oldsmobile models

Installation Notes and Fitment Tips

Verify filler neck style before installation. This cap is specified for deep cam filler necks and non-vented applications. Some Buick LeSabre and Buick Riviera listings note that a baffle in the filler neck may interfere on certain models, and several Chrysler, Dodge, Ford, Lincoln, and Mercury applications are listed with emission-system and body-style restrictions.

• Fits 1966-1970 Buick LeSabre, N/A; baffle in filler neck may interfere on some models; exc. wagon
• Fits 1966-1970 Buick Riviera, N/A; baffle in filler neck may interfere on some models
• Fits 1965-1970 Chevrolet Impala, N/A; exc. wagon
• Fits 1966-1970 Pontiac GTO, N/A
• Fits 1964-1970 Oldsmobile Cutlass, N/A; exc. wagon
• Fits 1967-1970 Cadillac DeVille, N/A

Quality Assurance

Gates OE Equivalent Fuel Caps are built to meet or exceed OEM specifications, with heavy-duty construction intended to match original-style fuel system service requirements. Part number 31732 is an OE performance replacement for applications that call for a non-vented, deep cam fuel cap.