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Peterbilt 330/335/337 Fuel Tank Caps

Check out our diverse selection of aftermarket and custom Peterbilt 330, 335, and 337 fuel tank caps. Explore stainless steel, aluminum, or plastic options with various turn styles to match your preferences. Enjoy locking and non-locking, vented, and non-vented choices. Shop now online at 4 State Trucks.
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  • Polished Fuel Tank Guard Cover And Latch W/ 4.25 Inch Neck Opening For Peterbilt

    Polished Fuel Tank Guard Cover And Latch W/ 4.25 Inch Neck Opening For Peterbilt

    AFTERMARKET

    $167.99
    Lock On Fuel Tank Guard Cover And Latch W/ 4.25 Inch Neck OpeningProtect what powers your truck with this Polished Fuel Tank Guard Cover and Latch built for Peterbilt. The 4.25-inch neck opening...
    01-060315
    SKU:
    01-060315
    Material Options:
    Steel
    Finish Options:
    Polished
    Product Type:
    Fuel Tanks
    Make:
    Peterbilt
    $167.99
    Qty in Cart: 0
    Price:
    $167.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 4 Inch Non-Locking Lever Style Fuel Cap For Peterbilt

    BESTfit 4 Inch Non-Locking Lever Style Fuel Cap For Peterbilt

    BESTFIT TRUCK PARTS

    $75.99 - $689.99
    Choose Option(s) to see description.Fitment* Fits Peterbilt 330 1995 thru 2005* Fits Peterbilt 335 2005 thru 2010* Fits Peterbilt 337 2011 thru 2022* Fits Peterbilt 352 1972 thru 1980* Fits Peterbilt...
    PPR_300546
    SKU:
    PPR_300546
    Truck Class:
    Heavy Duty
    Product Type:
    Fuel Tanks
    Material Options:
    Aluminum
    Diameter Options:
    4 Inch
    Style Options:
    Non Vented
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $75.99 - $689.99
    Qty in Cart: 0
    Price:
    $75.99 - $689.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 4 Inch Aluminum Non-Vented Lever-Style Locking Fuel Cap With Pressure Relief For Peterbilt

    BESTfit 4 Inch Aluminum Non-Vented Lever-Style Locking Fuel Cap With Pressure Relief For Peterbilt

    BESTFIT TRUCK PARTS

    $100.99 - $883.99
    Choose Option(s) to see description.Fitment* Fits Peterbilt 330 1995 thru 2005* Fits Peterbilt 335 2005 thru 2010* Fits Peterbilt 337 2011 thru 2022* Fits Peterbilt 352 1972 thru 1980* Fits Peterbilt...
    PPR_300549
    SKU:
    PPR_300549
    Material Options:
    Aluminum
    Style Options:
    Non Vented
    Truck Class:
    Heavy Duty
    Product Type:
    Fuel Tanks
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $100.99 - $883.99
    Qty in Cart: 0
    Price:
    $100.99 - $883.99
    Subtotal:
  • CSM Black Aluminum Alloy Water Tank Cap

    CSM Black Aluminum Alloy Water Tank Cap

    CHROME SHOP MAFIA

    $16.47
    38MM Water Tank Cap By Chrome Shop MafiaSafeguard your truck's fluids with the Chrome Shop Mafia Black Aluminum Alloy Water Tank Cap. Constructed from heavy-duty aluminum alloy weld billet, it fits...
    09-0707002
    SKU:
    09-0707002
    Ready To Ship:
    Yes
    Color:
    Black
    Make:
    Universal Items
    Product Type:
    Fuel Tanks
    Material Options:
    Aluminum
    $16.47
    Qty in Cart: 0
    Price:
    $16.47
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Rubber Fuel Cap Gasket For Peterbilt

    BESTfit Rubber Fuel Cap Gasket For Peterbilt

    BESTFIT TRUCK PARTS

    $13.17
    Replacement O-Ring Gasket By BESTfit Fits Peterbilt Lever Lock Style Fuel CapsPrevent dirt and dust from entering your fuel tank with this fuel cap gasket. It is made from nitrile butadiene rubber...
    01-060309
    SKU:
    01-060309
    Truck Class:
    Heavy Duty
    Product Type:
    Fuel Tanks
    Make:
    Peterbilt
    Diameter Options:
    3 3/4 Inch
    Material Options:
    Rubber
    Ready To Ship:
    Yes
    $13.17
    Qty in Cart: 0
    Price:
    $13.17
    Subtotal:
  • FREE SHIPPING
    Polished Billet Aluminum Fuel Cap Covers For Peterbilt W/ T Style Handle

    Polished Billet Aluminum Fuel Cap Covers For Peterbilt W/ T Style Handle

    LIFETIME NUT COVERS

    $385.99
    Fuel Cap Covers Polished Billet AluminumThis pair of fuel cap covers are made of polished billet aluminum. They are designed for fuel caps with a T style handle and mount easily with screws. The...
    01-060300
    SKU:
    01-060300
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Product Type:
    Fuel Tanks
    Material Options:
    Aluminum
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $385.99
    Qty in Cart: 0
    Price:
    $385.99
    Subtotal:
  • 4 Inch Aluminum Locking Fuel Cap

    4 Inch Aluminum Locking Fuel Cap

    AFTERMARKET

    $366.99
    4 Inch Fuel Cap Locking-8 NPSF Thread* High Quality Locking Fuel Cap* Aluminum* 4 Inch- 8 NPSF Thread* Vented * Made In USA* Sold Individually* Warranty On Locking Fuel Caps Against Defects In...
    09-06010001
    SKU:
    09-06010001
    Material Options:
    Aluminum
    Product Type:
    Fuel Tanks
    Make:
    Universal Items
    $366.99
    Qty in Cart: 0
    Price:
    $366.99
    Subtotal:
  • Chrome Plastic Locking Fuel Cap Cover For Peterbilt

    Chrome Plastic Locking Fuel Cap Cover For Peterbilt

    UNITED PACIFIC

    $9.22
    Chrome Plastic Fuel Cap Cover For Peterbilt - LockingThe locking fuel cap cover is made of durable injection-molded plastic and features a sleek chrome finish thanks to a triple plating process. It...
    01-06010054
    SKU:
    01-06010054
    Product Type:
    Fuel Tanks
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Ready To Ship:
    Yes
    $9.22
    Qty in Cart: 0
    Price:
    $9.22
    Subtotal:
  • Leak Defender Fuel Cap

    Leak Defender Fuel Cap

    HEAVY TRUCK SOLUTIONS

    $156.99
    Leak Defender Replacement Fuel CapStop fuel cap leaks with the Leak Defender Replacement Fuel Cap. Designed for trucks from Peterbilt, Kenworth, and more, it helps ensure a tight seal every time,...
    09-06010014
    SKU:
    09-06010014
    Product Type:
    Fuel Tanks
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    $156.99
    Qty in Cart: 0
    Price:
    $156.99
    Subtotal:
  • 3.5 OD X 2.85 Inch ID Fuel Cap Gasket

    3.5 OD X 2.85 Inch ID Fuel Cap Gasket

    AUTOMANN USA

    $3.80
    Replacement 0.14 Inch Thick Fuel Tank Cap GasketNeed a replacement gasket for your 572.1017 fuel cap? This rubber gasket measures 2.85 inches I.D., 3.50 inches O.D., and has a thickness of 0.14...
    09-06010002
    SKU:
    09-06010002
    Truck Class:
    Heavy Duty
    Diameter Options:
    2 3/4 Inch
    Material Options:
    Rubber
    Make:
    Universal Items
    Product Type:
    Fuel Tanks
    Ready To Ship:
    Yes
    $3.80
    Qty in Cart: 0
    Price:
    $3.80
    Subtotal:
  • Fuel Cap Cover For Peterbilt W/ Twist Lever Lock Caps

    Fuel Cap Cover For Peterbilt W/ Twist Lever Lock Caps

    AFTERMARKET

    $101.99
    Fuel Cap Covers W/ Lock CapsThis Locking Fuel Cap Cover fits select Peterbilt models with twist lever lock caps, providing the ultimate guard against fuel and fuel cap theft. It locks over the...
    01-060310
    SKU:
    01-060310
    Material Options:
    Aluminum
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Product Type:
    Fuel Tanks
    $101.99
    Qty in Cart: 0
    Price:
    $101.99
    Subtotal:
  • Aluminum Leak Defender Fuel Cap & Anti-Siphon Kit For Peterbilt

    Aluminum Leak Defender Fuel Cap & Anti-Siphon Kit For Peterbilt

    HEAVY TRUCK SOLUTIONS

    $123.99 - $418.99
    Choose Option(s) to see description.Fitment* Fits Peterbilt 330 1995 thru 2005* Fits Peterbilt 335 2005 thru 2010* Fits Peterbilt 337 2011 thru 2022* Fits Peterbilt 357 1987 thru 2007* Fits Peterbilt...
    PPR_4933
    SKU:
    PPR_4933
    Capacity:
    100 Gallons
    Position:
    Rear Fill
    Diameter Options:
    26 Inch
    Truck Class:
    Heavy Duty
    Material Options:
    Aluminum
    Shape Options:
    Cylindrical
    Make:
    Peterbilt
    Product Type:
    Fuel Tanks
    Ready To Ship:
    Yes
    $123.99 - $418.99
    Qty in Cart: 0
    Price:
    $123.99 - $418.99
    Subtotal:
  • FREE SHIPPING OVER $249
    2 Inch 11.5 TPI Brass Non-Vented Locking Fuel Cap

    2 Inch 11.5 TPI Brass Non-Vented Locking Fuel Cap

    VELVAC

    $79.99
    2 inch Locking Fuel Cap, Non- VentedKeep your fuel tank secure with this 2-inch non-vented brass fuel cap. Locks tight to prevent leaks and tampering. Ideal for various vehicles and equipment. Rest...
    29-060315
    SKU:
    29-060315
    Diameter Options:
    2 Inch
    Truck Class:
    Heavy Duty
    Style Options:
    Non Vented
    Material Options:
    Brass
    Make:
    Universal Items
    Product Type:
    Fuel Tanks
    Ready To Ship:
    Yes
    $79.99
    Qty in Cart: 0
    Price:
    $79.99
    Subtotal:
  • TPHD DEF Filler Cap Replaces 908-0223-01 For Kenworth & Peterbilt

    TPHD DEF Filler Cap Replaces 908-0223-01 For Kenworth & Peterbilt

    TURNPIKE TRUCK TRIM

    $24.84
    Diesel Exhaust Fluid Filler Cap By TPHD Fits Kenworth & PeterbiltThe TPHD DEF Filler Cap delivers durable, long-lasting protection for your DEF tank on Kenworth and Peterbilt trucks. Designed with a...
    29-060310
    SKU:
    29-060310
    Truck Class:
    Heavy Duty
    Make:
    Peterbilt
    Make:
    Kenworth
    Product Type:
    Fuel Tanks
    Ready To Ship:
    Yes
    $24.84
    Qty in Cart: 0
    Price:
    $24.84
    Subtotal:
  • FREE SHIPPING OVER $249
    2 Inch Brass 11.5 TPI Non-Vented Fuel Cap

    2 Inch Brass 11.5 TPI Non-Vented Fuel Cap

    VELVAC

    $45.16
    2 Inch Non-Vented Fuel CapLooking for a reliable fuel cap for your industrial or automotive needs? Check out the Brass 2 Inch 11.5 TPI Non-Vented Fuel Cap. Made of durable brass, it's perfect for...
    09-060301
    SKU:
    09-060301
    Truck Class:
    Universal
    Diameter Options:
    2 Inch
    Material Options:
    Brass
    Make:
    Universal Items
    Product Type:
    Fuel Tanks
    Style Options:
    Non Locking
    Ready To Ship:
    Yes
    $45.16
    Qty in Cart: 0
    Price:
    $45.16
    Subtotal:
  • 2 Inch Aluminum Non-Locking, Female, Vented Fuel Cap With 11-1/2 Threads

    2 Inch Aluminum Non-Locking, Female, Vented Fuel Cap With 11-1/2 Threads

    VELVAC

    $89.99
    2 Inch Non-Locking Fuel Cap, VentedReplace a poorly fitting fuel cap with this premium quality non-locking Velvac Fuel cap that is precision designed to deliver OE fit and functionality. It will...
    09-060300002
    SKU:
    09-060300002
    Truck Class:
    Universal
    Diameter Options:
    2 Inch
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Fuel Tanks
    $89.99
    Qty in Cart: 0
    Price:
    $89.99
    Subtotal:
  • FREE SHIPPING OVER $249
    CSM Non-Vented Lever Lock Flush Fuel Tank Cap Assembly

    CSM Non-Vented Lever Lock Flush Fuel Tank Cap Assembly

    CHROME SHOP MAFIA

    $190.99
    Non-Vented Lever Lock Flush Fuel Cap Assembly by Chrome Shop MafiaThis flush fuel cap assembly features an unvented cap with a lever lock and an O-Ring Seal. It is sold individually and is made in...
    09-060300
    SKU:
    09-060300
    Truck Class:
    Universal
    Location:
    Made In USA
    Style Options:
    Non Vented
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Fuel Tanks
    Ready To Ship:
    Yes
    $190.99
    Qty in Cart: 0
    Price:
    $190.99
    Subtotal:
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Adding your products to cart

Keep your fuel secure and your truck running smoothly with our durable fuel tank caps. Why Choose These Caps? Prevent leaks and reduce siphoning. Locking options for extra security. Vented designs for better airflow. Made from tough materials like aluminum and brass. Whether you need a replacement or an upgrade, these caps deliver reliable protection and long-lasting performance for your Peterbilt. Stay road-ready with the best in fuel tank security.

Frequently Asked Questions About Peterbilt 330/335/337 Fuel Tank Caps

Will these fuel tank caps fit my specific Peterbilt model year?

Our fuel tank caps are designed to fit Peterbilt 330, 335, and 337 models from 2005 to present. However, there were minor changes in tank neck designs between 2005-2007 and 2008+ models. Most caps are universal within this range, but we recommend checking your existing cap's thread size (typically 2.5" or 3.5" diameter) or contacting us with your OEM for exact fitment verification.

What's the difference between vented and non-vented fuel caps?

Vented caps allow air to enter the tank as fuel is consumed, preventing vacuum buildup that can cause fuel flow issues. Non-vented caps create a sealed system. Most Peterbilt 330/335/337 models require vented caps for proper operation. Using the wrong type can cause hard starting, stalling, or fuel gauge problems. Check your owner's manual or look for "VENTED" stamped on your original cap.

Are locking fuel caps worth the extra cost for these models?

Locking fuel caps are highly recommended for Peterbilt medium-duty trucks, especially for fleet operations or overnight parking. They prevent fuel theft and contamination from debris or water. Our locking caps use either keyed or combination mechanisms and maintain the same venting properties as standard caps. The typical $20-40 premium pays for itself by preventing even one instance of fuel theft or contamination.

How do I know if my fuel cap needs replacement?

Replace your fuel cap if you notice: fuel smell around the tank area, visible cracks in the rubber gasket, difficulty tightening or the cap won't click when turned, or rust/corrosion on metal components. A faulty cap can trigger emissions failures and reduce fuel economy by 1-2% due to evaporation.

Can I use aftermarket caps or should I stick with OEM?

Quality aftermarket caps that meet OEM specifications work perfectly for Peterbilt 330/335/337 models and often cost 40-60% less than dealer parts. Look for caps that specify SAE J1810 compliance and include proper O-ring seals. Our aftermarket options use the same materials (aluminum or reinforced polymer) and threading as OEM caps. The main difference is branding, not performance or durability.


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