01
Place CapLok Fuel Shield
Place CapLok Fuel Shield around compatible external fuel caps. CapLok Fuel Shield is designed to fit securely around fuel caps on compatible commercial trucks.
🏷 Labor Day Sale · Aug 31–Sep 8
Get Any Pair for $199.90 $149.95
Get any 2 CapLok Fuel Shields for $149.95. Add a third Fuel Shield and save 25% on the additional shield. Valid August 31 through September 8, 2026.
2 shields: LABORDAYPAIRDEAL
3 shields: LABORDAYTRIODEAL
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Flagship Product
CapLok Fuel Shield
SKU: CL-FS-PBTL
Peterbilt trucks have a distinct fuel cap setup that requires a dedicated fit — not a universal workaround. The PBTL Fuel Shield is built specifically for Peterbilt geometry, so the enclosure sits right and locks right.
Pricing
$99.95
each◆
Find My CapLok Fuel Shield
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Truck Not Listed?
Your truck may still be compatible. Contact us and we'll check your application.
Contact CapLokSelect Model
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Free Same-Day Shipping
Business days · 3–5 day delivery
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Lifetime Limited Warranty
Original purchaser
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30-Day Money-Back
Eligible returns
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Direct CapLok Support
info@caplokusa.com
Key Features
- ✓Built-in lock with shiny plated finish
- ✓ Includes 3 keys
- ✓ Cover spins freely when locked — cannot be gripped or removed
- ✓ Built-in spring opening mechanism
- ✓ All-weather, corrosion-proof lock
- ✓ Made from Zamak5 Zinc Alloy
- ✓ Can be transferred between vehicles
- ✓ Precision-fit for Peterbilt fuel cap geometry
- ✓ Designed for heavy-duty Class 8 trucks — may fit other vehicles based on fuel cap dimensions
- ✓ No drilling required on compatible applications
- ✓ Keyed-alike options available for fleet orders
- ✓ Replacement keys available from CapLok
- ✓ Lifetime Limited Warranty — original purchaser
Installation
Three Steps to a More Secure Fuel Access Point
02
Secure the Lock
Close and lock CapLok Fuel Shield around the gas cap. The spring loaded locking mechanism engages to create a physical barrier around the fuel cap.
03
Help Deter Unauthorized Access
The locked enclosure creates an additional physical barrier around the fuel cap, making the access point harder to target and more visible as protected.
Technical Specifications
Cover DimensionsID 4 11/16" × 1.45" (H)
Compatible PlatformsPeterbilt 300, 500, and legacy series
InstallationNo drilling — no permanent modification
Keyed AlikeAvailable on fleet orders
WarrantyLifetime Limited — original purchaser
ShippingFree same-day on business days
Fleet Purchasing
Volume pricing, keyed-alike options, centralized ordering, and dealer installation coordination are available for qualifying fleet purchases.
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Lifetime Limited Warranty
Original purchaser
Lifetime Limited Warranty for the original purchaser. Covers defects in materials and workmanship. Does not cover intentional damage, misuse, improper installation, unauthorized modifications, theft-attempt damage, accidents, or normal wear.
View Full Warranty →Replacement Parts
- ✓Replacement Key
Frequently Asked Questions
What is CapLok Fuel Shield?⌄
CapLok Fuel Shield is an external locking enclosure designed to surround and protect the fuel-cap access point on compatible semi-trucks and commercial vehicles. It adds a physical barrier around the exposed fuel cap to help deter unauthorized access.
How does CapLok Fuel Shield help deter fuel theft?⌄
CapLok Fuel Shield adds a heavy-duty locked barrier around the exposed fuel cap, making the access point harder to reach and more visible as protected. This helps deter opportunistic unauthorized access before it occurs.
Which trucks are compatible with CapLok Fuel Shield?⌄
CapLok offers Fuel Shield models for Freightliner, Sterling, Western Star (FLNR), Kenworth, International, Mack, Volvo (KWHD), Universal Medium Duty including M2, Hino, and International (UNIV), and Peterbilt (PBTL). Use the compatibility checker to confirm your specific vehicle.
Does CapLok Fuel Shield replace the fuel cap?⌄
No. CapLok Fuel Shield is an external enclosure that surrounds the existing fuel cap. It does not replace or alter the original fuel cap.
Is drilling required to install CapLok Fuel Shield?⌄
No drilling is required on compatible applications. CapLok Fuel Shield is designed for installation without permanent modification to compatible vehicles.
How long does installation take?⌄
Installation time varies by vehicle and configuration. CapLok Fuel Shield is designed for practical, fast installation on compatible applications. Contact CapLok for specific installation guidance.
Is CapLok Fuel Shield weather resistant?⌄
Yes. CapLok Fuel Shield features a weather-resistant design intended to hold up under typical commercial outdoor operating conditions.
Can fleet units be keyed alike?⌄
Yes — keyed-alike options are exclusively available when ordering direct from CapLok. Authorized dealers carry individual units only. Contact CapLok for fleet pricing and keyed-alike availability.
Can I order replacement keys?⌄
Yes. Replacement key support is available. Contact CapLok for replacement key ordering information.
Does CapLok Fuel Shield guarantee that fuel cannot be stolen?⌄
No. CapLok Fuel Shield is designed to help deter unauthorized access and add a physical barrier around the fuel cap. No security product can guarantee that theft will never occur.
What if my truck is not listed?⌄
Use the compatibility checker or contact CapLok directly to submit your vehicle for review. We will assess whether a compatible CapLok Fuel Shield model exists for your application.
Do you offer fleet pricing?⌄
Yes. Fleet pricing is available for qualifying volume orders. Contact CapLok or visit the Fleet Solutions page for more information.
Do you offer dealer pricing?⌄
Yes. CapLok has a dealer program with wholesale pricing and dealer margins. Visit the Dealers page or contact us to apply.
Can CapLok Fuel Shield be used on vehicles not listed?⌄
Compatibility depends on the specific fuel cap design, surrounding clearance, and tank configuration. Use the compatibility checker or contact CapLok directly to submit your vehicle for review.
Does CapLok Fuel Shield have a lifetime warranty?⌄
Yes. CapLok Fuel Shield includes a Lifetime Limited Warranty for the original purchaser covering defects in materials and workmanship. It does not cover intentional damage, misuse, improper installation, unauthorized modifications, theft-attempt damage, accidents, or normal wear.
What is the 30-day money-back guarantee?⌄
Eligible CapLok Fuel Shield units may be returned within 30 calendar days of delivery. The unit must meet the conditions listed in the official return policy and include all original parts, keys, hardware, and accessories.
Does the warranty cover damage from a break-in attempt?⌄
No. Damage caused by forced entry, theft attempts, vandalism, or intentional damage is not covered by the CapLok Fuel Shield Lifetime Limited Warranty.
Are lost keys covered under warranty?⌄
No. Lost or stolen keys are not covered by the warranty, but replacement key support is available. Contact CapLok for details.
The CapLok Fuel Shield Difference
Built for the Demands of Commercial Work
Every detail of the CapLok Fuel Shield is engineered around the real challenges faced by commercial vehicle owners and fleet operators.
Purpose-Built Security
Engineered specifically for commercial fuel-cap vulnerabilities — not a generic lock adapted for the application.
Rugged Construction
Heavy-duty metal construction built to withstand daily commercial use, outdoor exposure, and harsh working conditions.
Easy Installation
Fast installation on compatible vehicles with no permanent modification required — designed for minimal downtime.
Fleet-Ready
Scalable from single-truck owner-operators to national carriers with large fleets. Keyed-alike fleet options available.
Professional Support
Dedicated support for compatibility questions, fitment confirmation, fleet pricing, and dealer inquiries.
Replacement Parts
Replacement keys available to keep your CapLok Fuel Shield operational long-term.
Trusted Engineering
Designed with commercial-grade precision and tested for the demands of real working commercial vehicles.
Commercial-Grade Quality
Built to professional standards with materials and finishes appropriate for branded fleet vehicles.
