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Gates

Gates 31844 Locking Fuel Tank Cap

Based on 2,827 reviews
Condition: New
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$20.74
Holiday Deal · 39% off was $34.11

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This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2027

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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Nov 9
Order within 13 hours and 44 minutes

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At a glance

Condition
New
Weight
2.24 oz
Color
Black
Material
Rubber
Exterior Finish
Per Item Description
Vehicle Service Type
Car, Truck
Style Name
Modern
In the box
Per Item Description

Features 5

  • Seals are compounded from fuel-resistant rubber
  • Locking Mechanism deters fuel theft & vandalism
  • Comes w/ 2 Keys. Lock opens with 1/4 in. turn of key
  • Rugged, heavy-duty construction

Description

Gates Locking Fuel Tank Caps meets OEM specifications, Federal & State emission requirements. Two-way action pressure relief/vacuum relief valve allows the fuel tank to breathe while preventing the escape of fuel fumes.

Specs 23

Brand Gates
Color Black
Material Rubber
Exterior Finish Per Item Description
Vehicle Service Type Car, Truck
Brand Name Gates
Model Number 31844
Manufacturer Part Number 31844

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Nov 9

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

Worked fantabulous, then...
Bought late January 2021. Works great with my 2007 Chevy Aveo5 2.7. I bought this because my gas door lock is broken so the door can just be pushed open for easy access. It's been about a month, no lights or codes. However in cold months it can get frozen, so I'd recommend some lock ease be worked in to prevent freezing. It's really awkward when you're near empty on your way to work and can't get the key in because it's frozen shut lol. EDIT: June 4, 2021. Normal use, no codes... But... It no longer seals. It acts like it's unlocked, to put it on, but then as soon as you lock it, it unseals.. then you can't even seal it after unlocking it again... Just seizes up.. found when I went to fill up with gas after being out of work for a few months, and the cap wasn't sealed at all... fortunately no codes still. Went back to my stock fuel cap.. ... show more
Reviewed in the United States on March 9, 2021 by Zodiac
PURCHASED FOR 08 IMPALA. NO ISSUES WORKS AS IT SHOULD AAA+ !!!
I HAVE DRIVEN 500 MILES WITH NO ISSUES ! NO SERVICE ENGINE LIGHT OR TIGHTEN GAS CAP WARNING. I SLEEP BETTER WITH THIS GAS CAP LOCK KNOWING NOTHING IS GOING INTO MY GAS TANK EXCEPT GASOLINE. A COUPLE OF TIMES I NOTICED I HAD LESS GAS IN THE TANK THEN I THOUGHT THERE WAS OR SHOULD BE AFTER FILLING UP THE GAS TANK AND THOUGHT MAYBE I DROVE 100 OR SO MILES AND SIMPLY FORGOT, HOWEVER THIS HAPPENED TO MANY TIMES AND I NORMALLY DO NOT HAVE MEMORY ISSUES LIKE THIS AND DEFINITELY NOT 5 TO 6 TIMES IN A SHORT PERIOD OF TIME. THIS GAS CAP FITS PERFECT AND WORKS AS GOOD AS THE ORIGINAL GAS CAP DID. THE PRICE WAS HALF OF WHAT AUTOZONE QUOTED ME FOR THERE DURALAST BRAND AT $20.00 I PAID UNDER $10.00 FOR THIS Gates 31844 Locking Fuel Cap AND I LOVE IT !!! THANK YOU AMAZON !!!! ... show more
Reviewed in the United States on November 2, 2019 by Karen and Michael
Works well as a deterrent. Emphasis on deterrent.
This cap does exactly as it describes. It does make your fuel tank a bit safer from just anyone looking for a quick come up on gas. Or a possible hater doing what haters do. (Puting sand, water, oil, gelatine.. the regular suspects) That being said, with a thin flat head screwdriver the lock can be "picked" so the cap will allow you to open it. Idk if it is just a small amount of these have this defect or it is every one they have put out. Just know this isnt a 100% secure gas cap. Like I said it's a deterrent. ... show more
Reviewed in the United States on July 24, 2021 by G
2011 Cadillac CTS
My 2011 Cadillac CTS coupe has one of the gas tanks where you just push on it and it opens and you can just take the cap off. I purchased this as a sort of “upgrade” and a $5 universal tether (also on Amazon) and it works great!! I absolutely love it and it fits like a glove and locks like I want it to! Great buy (: ... show more
Reviewed in the United States on March 8, 2022 by Martha Chance
Junk!!!
Don’t buy!!! Had a little trouble unlocking the first time,second time it worked fine and now the third time it won’t unlock and I’m going to have to break it to get it off. Today is 6/10/26 and it was delivered 4/22/26. I don’t have to do a ton of driving so I’m passed the return date. They got my money and now I’m stuck. Corporate gets richer and the regular man gets poorer!!!! ... show more
Reviewed in the United States on June 10, 2026 by pamela
Allows the fuel filler door to close!
Review Image by SRE
I had to return a Stant and an ACDelco gas/fuel cap because they were slightly larger than the original gas cap so they caused the filler lid to remain open. I anticipated the same issue for the Gates so I created a spacer to recess the filler tube. Perhaps I should've waited since the Gates appears even shorter than the standard OEM cap, so I'm pretty sure the filler door would've closed without the filler tube modification. Unlike the other caps, the Gates doesn't require the key to be inserted one way only and can be extracted whether it's turned to the right or the left, but the key has to remain turned to the left to install or remove the cap. One has to remember to turn the key to the right, aligning with the "ears" or "handle" to lock the cap...which is usually the primary reason for buying a locking cap. That "S" in the photo means Stant so Amazon needs to swap it with a Gates photo. Anyway, I'm thrilled. Thank you Amazon! ... show more
Reviewed in the United States on November 6, 2020 by SRE
Disappointed
Locked & unlocked easy but Did not clear ENGINE WARNING LIGHT. ( Which was key reason for purchase!)
Reviewed in the United States on July 8, 2026 by William G
so far so good
Updates 7-3-25 POS already broke, only used it hand full of times and now it wont lock just spins and spins yes i made sure it was unlocked with the key first, cheap gates has gone down hill looks and works good on my 2004 sierra 5.3L 4x4
Reviewed in the United States on November 13, 2024 by NUSA
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