The Best locking diesel fuel cap of 2025 – Reviewed and Top Rated
After hours researching and comparing all models on the market, we find out the Best locking diesel fuel cap of 2025. Check our ranking below.
2,384 Reviews Scanned
Rank No. #1
Stant Diesel Only Locking Fuel Cap, Green
- Durable locking fuel cap made for a long lasting life.
- Comes with 2 keys.
- Unlike other aftermarket fuel caps, Stant fuel caps include all of the safety features found on the original equipment cap.
- Customer safety is an important feature of Stant products.
- Fit type: Vehicle Specific
Rank No. #2
10591D Locking Diesel Fuel Cap Gas Cap Fuel Tank Caps Fit for Chevy Silverado Express C3500 K3500, Dodge Ram 3500 W350 D350, Ford F-250 E-350, GMC Sierra Savana, OE # 9MGC791, MGC791, 10591
- Manufacturer Part Number: 10591D | Interchange Part Number: 9MGC791, MGC791, 31778D, 40791, 35039D, 40591, 10591
- Package includes: 1 * Locking Fuel/Gas Cap, 2 * keys
- Compatible with Chevy: 1981 Chevrolet C10 | 1992 Chevrolet C2500 | 1990 Chevrolet C3500 | 2000-2013 Chevrolet Express 3500 | 2011 Chevrolet Express 4500 | 1995 Chevrolet K2500 | 1988, 2000 Chevrolet K3500 | 1984 Chevrolet K5 Blazer | 1997 Chevrolet P30 | 2001-2016 Chevrolet Silverado 2500 HD | 2007 Chevrolet Silverado 2500 HD Classic | 2001-2006 Chevrolet Silverado 3500 | 2007 Chevrolet Silverado 3500 Classic | 2007-2019 Chevrolet Silverado 3500 HD |
- Compatible with Dodge & Ford: 1989-1990 Dodge D250 | 1991-1993 Dodge D350 | 1994-1999 Dodge Ram 2500 | 1994-1999 Dodge Ram 3500 | 1990-1993 Dodge W250 | 1993 Dodge W350 | 2003 Ford E-350 Club Wagon | 1989-1998 Ford E-350 Econoline | 2000-2003 Ford E-350 Super Duty | 2001-2005 Ford Excursion | 1987-1996 Ford F-250 | 1997 Ford F-250 HD | 1999-2008 Ford F-250 Super Duty | 1987-1997 Ford F-350 | 1999-2008 Ford F-350 Super Duty |
- Compatible with GMC: 2000 GMC C3500 | 1986 GMC K3500 | 2002-2012 GMC Savana 3500 | 2001-2015 GMC Sierra 2500 HD | 2007 GMC Sierra 2500 HD Classic | 2001-2006 GMC Sierra 3500 | 2007 GMC Sierra 3500 Classic | 2007-2017 GMC Sierra 3500 HD | 1988 GMC V3500 |
Rank No. #3
10591D Locking Fuel Gas Cap For Diesel Trucks Fuel Tank Fit for Chevrolet Dodge Ford GMC Etc Car Fuel Cap
- Applicable: The fuel tank cap is fit for some models such as Chevrolet, Dodge, Ford, GMC, etc
- Replacement Part Numbers: 10591D, 9MGC791, MGC791, 31778D, 40791, 35039D, 40591, 10591
- Features: The locking gas cap provides a tight seal to keep the vehicle's fuel tank closed; sealed fuel tank reduces vapor emissions and helps protect the environment; prevents fuel loss
- Premium Material: The locking gas cap is made of high quality ABS plastic and a tight rubber ring, resistant to high temperatures, providing a tight seal, optimizing the performance and fuel efficiency of the vehicle
- Easy installation: The locking gas cap is simple and convenient to install, you can complete the installation by yourself, no need to go to the repair shop, saving time and effort
Rank No. #4
10591D Locking Gas Cap Diesel Fuel Cap for Chevy Silverado Ford F250 F350 Super Duty Accessories GMC 2500 Diesel Gas Transfer Tank Lock Fuel Truck Cap Cover with Key oem 10591 MGC791 2008 2019
- 【Replace Part Numbers】 10591D 9MGC791 MGC791 31778D 35039D 40591 40791 10591 diesel fuel cap with key. The locking gas cap provides a tight seal to keep the vehicle's fuel tank closed.
- 【for Chevy】 10591D locking fuel gas cap for 1981 Chevy C10 | 1984 Chevy K5 Blazer | 1992 Chevy C2500 | 1990 Chevy C3500 | 1995 Chevy K2500 | 1988 2000 Chevy K3500 | 1997 Chevy P30 | 2000-2013 Chevy Express 3500 | 2001-2016 Chevy Silverado 2500 HD | 2001-2006 Chevy Silverado 3500 | 2007 Chevy Silverado 2500 HD Classic | 2007 Chevy Silverado 3500 Classic | 2007-2019 Chevy Silverado 3500 HD | 2011 Chevy Express 4500
- 【for Dodge & Ford】 10591 Fuel tank filler cap for 1989 1990 Dodge D250 | 1990-1993 Dodge W250 | 1991-1993 Dodge D350 | 1993 Dodge W350 | 1994-1999 Dodge Ram 2500 3500 | 1987-1996 Ford F-250 | 1987-1997 Ford F-350 | 1989-1998 Ford E-350 Econoline | 1997 Ford F-250 HD | 1999-2008 Ford F-250 F-350 Super Duty | 2000-2003 Ford E-350 Super Duty | 2001-2005 Ford Excursion | 2003 Ford E-350 Club Wagon
- 【for GMC】 Diesel tank cap with lock for 1986 GMC K3500 | 1988 GMC V3500 | 2000 GMC C3500 | 2001-2015 GMC Sierra 2500 HD | 2002-2012 GMC Savana 3500 | 2007 GMC Sierra 2500 HD Classic | 2001-2006 GMC Sierra 3500 | 2007 GMC Sierra 3500 Classic | 2007-2017 GMC Sierra 3500 HD
- 【Locking Diesel Fuel Cap】diesel fuel cap lock , diesel gas cap lock , diesel tank locking cap , 1990 ford f250 gas cap locking , diesel tank cap with lock , locking diesel fuel cap ford f250 , 10591d locking fuel gas cap , ford f250 f350 super duty gas cap replacement accessories , 2004 2008 fort f250 diesel tank cap , 2004 2008 fort f250 diesel tank cap
Rank No. #5
Stant Diesel Only Locking Fuel Cap, Green
- Durable locking fuel cap made for a long lasting life.
- Comes with 2 keys.
- Unlike other aftermarket fuel caps, Stant fuel caps include all of the safety features found on the original equipment cap.
- Customer safety is an important feature of Stant products.
- Fit type: Vehicle Specific
Rank No. #6
The Flow Security Systems VersaLock | Vented Locking Fuel Tank Cap | for Transfer Tanks & Above Ground Commercial Tanks | Prevents Theft & Secures Fuel Tanks | FSS 754 | Includes Adapter
- PREVENT UNAUTHORIZED USE: The Flow Security Systems PRE-VENT Fuel Cap is a quick and inexpensive way to safeguard costly fuel and oil from theft, tampering, siphoning and vandalism. The VersaLock utilizes our patented free spinning design and is perfect for all business owners who want to secure their transfer fuel tanks.
- MULTIPLE USE: The FFS-754 is designed for use on mobile fuel transfer tanks as well as above ground commercial gas and distillate tanks. The VersaLock has a weather proof self-closing latch covering the face of the lock to prevent dust, dirt, debris and moisture from entering the lock.
- KEYED DIFFERENTLY OR THE SAME: The VersaLock can be keyed alike so that multiple fuel caps can be secured with the convenience of having only one key. Perfect for those who have multiple transfer tanks and don't have to carry different keys for each tank. The VersaLock can also be keyed differently so that each fuel cap can have its own unique key providing added security for your tank.
- BUILT IN VALVE: The FSS-754 uses built in valves to equalize the pressure and vacuum. The pressure vent valve allows the pressure relief valve to open at 1.5 Lbs and vacuum release to open at 1.5 Oz. This heavy duty lock is make from hard non ferrous alloy and fits standard 2 inch male thread.
- PATENTED DESIGN: The FSS-754 is different from any other cap on the market today. It is designed with our patented "free-spinning" technology. When the cap is in the secure mode the cap will free spin making it virtually impossible to remove.
SaleRank No. #7
Stant Diesel Only Locking Fuel Cap, Green
- Durable locking fuel cap made for a long lasting life.
- Comes with 2 keys.
- Unlike other aftermarket fuel caps, Stant fuel caps include all of the safety features found on the original equipment cap.
- Customer safety is an important feature of Stant products.
- Fit type: Vehicle Specific
Rank No. #8
2pcs Locking Diesel Fuel Cap Compatible with Freightliner Kenworth Western Star Fuel Caps,3 1/2" Course Thread 5.5 TPI Vented Semi Truck Fuel Tank Cap with 4 Keys
- 【COMPATIBILITY】The locking diesel fuel cap for Freightliner before 1984,for Kenworth after 1984,for Peterbilt before 1980, for Western Star before 1983.Replacement part number 572.1036, SNV431089, K071-385-1234.
- 【HIGH QUALITY MATERIAL】 The fuel tank cover is made of high-quality aluminum alloy, which has the advantages of corrosion resistance, oxidation resistance, and longer service life; There are high-quality lock cylinders and 4 matching keys to ensure that diesel oil will not be stolen,Safety chain and crossbar are standard.
- 【PROFESSIONAL REPLACEMENT PART】Provides a tight seal to keep your vehicle's fuel tank closed, safety your vehicle's occupants, fuel economy and reduce vapor emissions. The fuel cap is equipped with a rubber sealing ring , to ensure no leakage.
- 【EASY TO REPLACE】100% New and ready to install straight out of the box. You might be able to fix your gas cap problem without visiting your local auto shop, saving both time and money.
- 【NOMINAL SIZE】3 1/2" Nominal Size, 5 1/2 Threads/Inch For diesel applications only,Please measure the diameter of your current fuel cap or fuel tank fill tube prior to ordering.This product comes with a blue protective film, peel off the film before use,Also if you have any other questions on our this locking gas cap, please contact us at the first time.
SaleRank No. #9
10591D Locking Diesel Fuel Tank Cap Fuel Cap Gas Cap Compatible with Chevy Silverado Express C3500 K3500 Dodge Ram 3500 W350 D350 Ford F-250 E-350 GMC Sierra Savana 9MGC791 MGC791 10591
- Manufacturer Part Number：10591D 9MGC791 MGC791 31778D 40791 35039D 40591 10591.
- Fitment：Compatible with Chevrolet C10 1981 / Chevrolet C2500 1992 / Chevrolet C3500 1990 / Chevrolet Express 3500 2000-2013 / Chevrolet Express 4500 2011 / Chevrolet K2500 1995 / Chevrolet K3500 1988, 2000 / Chevrolet K5 Blazer 1984 / Chevrolet P30 1997 / Silverado 2500 HD 2001-2016 / Silverado 2500 HD Classic 2007 / Silverado 3500 2001-2006 / Silverado 3500 Classic 2007 / Silverado 3500 HD 2007-2019
- Fitment：Compatible with GMC C3500 2000 / GMC K3500 1986 / GMC Savana 3500 2002-2012 / GMC Sierra 2500 HD 2001-2015 / GMC Sierra 2500 HD Classic 2007 / GMC Sierra 3500 2001-2006 / GMC Sierra 3500 Classic 2007 / GMC Sierra 3500 HD 2007-2017 / GMC V3500 1988
- Fitment：Compatible with Ford E-350 Club Wagon 2003 / Ford E-350 Econoline 1989-1998 / Ford E-350 Super Duty 2000-2003 / Ford Excursion 2001-2005 / Ford F-250 1987-1996 / Ford F-250 HD 1997 / Ford F-250 Super Duty 1999-2008 / Ford F-350 1987-1997 / Ford F-350 Super Duty 1999-2008
- Fitment：Compatible with Dodge D250 1989-1990 / Dodge D350 1991-1993 / Dodge Ram 2500 1994-1999 / Dodge Ram 3500 1994-1999 / Dodge W250 1990-1993 / Dodge W350 1993
Rank No. #10
Locking Diesel Fuel Cap Gas Cap Fuel Tank Caps Compatible with Ford F250 E350 E-350 Replacement for Ram 3500 W350 D35 for Sierra Savana Silverado Express C3500 K3500 Replaces 10591D 9MGC791 MGC791
- [Replace part number]10591D 31778D 9MGC791 MGC791 40791 35039D 40591 Fuel Tank Filler Cap Is Rigorously Tested Before Shipping. Check The Part Number To Confirm The Compatibility Before Purchase.
- [Perfect Fitment]Compatible with Dodge :1989-1990 D250/1991-1993 D350/Replacement for Ram 2500 1994-1999/Replacement for Ram 3500 1994-1999/1990-1993 W250/1993 W350, Compatible with Ford:2003 E-350 Club Wagon/1989-1998 E-350 Econoline/2000-2003 E-350 Super Duty/2001-2005 Excursion/1987-1997 F-350/1999-2008 F-350 Super Duty/Replacement for F-250 1987-1996/Replacement for F-250 HD 1997 /Replacement for F-250 Super Duty 1999-2008
- [Perfect Fitment]Compatible with GMC:2000 C3500/2002-2012 Savana 3500/2001-2015 Sierra 2500 HD/2007 Sierra 2500 HD Classic/2001-2006 Sierra 3500/2007 Sierra 3500 Classic/2007-2017 Sierra 3500 HD/1988 V3500, Compatible with Chevrolet:1981 C10/1992 C2500/1990 C3500/2000-2013 Express 3500/2011 Express 4500/1995 K2500/1988, 2000 K3500/1984 K5 Blazer/1997 P30/2001-2016 Silverado 2500 HD/2007 Silverado 2500 HD Classic/2001-2006 Silverado 3500/2007 Silverado 3500 Classic/2007-2019 Silverado 3500 HD
- [High performance] All Fuel Filler Cap Are Tested Before Leaving The Factory To Ensure That The Product Quality Meets The Standards.Provides A Tight Seal To Keep Your Vehicle's Fuel Tank Closed, Safety Your Vehicle's Occupants, Fuel Economy And Reduce Vapor Emissions！
- [Customer Service] If For Any Reason At All, You'Re Not 100% Satisfied With The Fuel Tank Filler Cap, Simply Return It For A Change in 365 Days.
Last update on 2025-05-12 / Affiliate links / Images from Amazon Product Advertising API
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