Add locking side-rail storage without paying for the newest generation with the Weather Guard 184-0-03 lo-side truck tool box. This 41" box wears bright aluminum diamond plate under a durable Clear ARMOR TUF coat. Bright aluminum is the look most people picture on a work truck, and it lights up the bed while the tread pattern quietly hides the dings and scuffs of daily use. It mounts on top of one bed side rail so it rides low, preserves your rear visibility and leaves the bed floor open for sheet goods and cargo, and it locks down 3.0ft³ of weather-sealed storage behind a one-key high-security push-button lock and PowerSync ready wiring access. This is the previous-generation redesigned Lo-Side, so you get a lower price than the latest 1Key UltraLock version while keeping the high-security push-button lock and PowerSync ready wiring for add-on interior lights and keyless entry. Aluminum keeps it lighter than a comparable steel box, so it will not eat into your payload.
What's Included:
184 Series 41" Lo-Side aluminum truck tool box in bright aluminum
Under-rail mounting clamps and hardware for a no-drill install
Gas strut for controlled lid lift
Removable tray
Full-perimeter weather seal, pre-installed
Drain plug
Weather Guard installation instructions
Features
41" of Secure Side-Rail Storage At 41" long the 184-0-03 runs along one bed side rail and gives you 3.0ft³ of lockable, organized storage while keeping the rest of the bed floor clear. The compact footprint fits full-size and mid-size trucks and leaves room for larger cargo.
Bright Aluminum Diamond Plate Finish A Clear ARMOR TUF powder coat protects the bright aluminum diamond-plate tread against corrosion and fading while keeping that traditional polished-tread shine. It cleans up fast, and the tread pattern helps hide the everyday scuffs of jobsite life.
Classic Look, Easy to Match Bright aluminum diamond plate matches almost any truck color and never looks out of place, which also helps at resale. It pairs naturally with chrome and polished trim and keeps that traditional contractor look season after season.
Gas Strut and Reinforced Lid A gas strut controls how the reinforced lid opens and closes for smooth, one-handed access, and the lid opens to about 90 degrees and resists flex even when you lean on it. An optimized latch needs less force to close.
One-Key Security, PowerSync Ready A high-security push-button lock pairs a keyed cylinder with drill-resistant keyholes for real protection, and the box is PowerSync capable so you can add interior lights and remote keyless entry. Code multiple boxes on a truck or a whole fleet to one key.
Full-Perimeter Weather Seal A memory-resistant, multi-ridge weather strip runs the entire lid perimeter to keep rain, dust and debris out, and a drain plug lets any moisture that does get in escape, so your tools stay dry and ready on wet and dusty jobsites.
✓ Yes, a great short-box fit, measure the rail first
Very and heavy accessories
5'
-
● Measure first, confirm rail clearance behind the cab
Fit guidance: Lo-Side boxes mount on top of one bed side rail and keep the bed floor open for cargo. At 41" long this is the versatile short box, so it fits full-size trucks with rail to spare and fits most mid-size and compact pickups. It mounts on either the driver or passenger side rail. Always measure your usable bed side rail length and confirm clearance behind the cab before ordering.
Weather Seal: Full-perimeter, multi-ridge weather seal
Mounting: Sits on top of one bed side rail, under-rail clamps and hardware included, no drilling required
Electrical: 12V access for electrical upfits, PowerSync capable
Drainage: Drain plug
Weight: About 36.85 lb (shipping)
Warranty: Limited Lifetime
Made In: USA
Installation
Type: Side-rail mount, clamp-in with no drilling · Time: About 20 to 30 minutes · Tools: Socket or wrench set and a tape measure; no drill needed with the included under-rail clamps · Difficulty: Easy, one person can handle this short box
Set the box on top of one bed side rail and position it front to back, then hook the included clamps under the rail lip and tighten the hardware evenly so the box sits flat and the lid seals. Follow the Weather Guard installation instructions for exact clamp placement and torque.
Watch the installation walkthrough:
Resources
Everything you need for your Weather Guard 184 Lo-Side Truck Tool Box, 41" Bright Aluminum Diamond Plate, in one place.
Warranty. Limited Lifetime Warranty from Weather Guard against defects in materials and workmanship.
Free shipping. This item ships free to the lower 48 states. Because it is an oversized item, it ships by freight and typically arrives in 3 to 7 business days.
Inspect on delivery. Please inspect the packaging before signing. If you see any damage, note it on the delivery receipt and contact us right away, and we will make it right.
About Weather Guard
Weather Guard has built professional-grade truck and van storage in the USA for decades and is the storage brand tradespeople, contractors, and fleets reach for first. Its steel and aluminum tool boxes, ladder racks, and van-interior systems are engineered to survive daily jobsite abuse and keep expensive tools secure and organized.
Known for weather-tight seals, patented locking systems, and heavy-gauge construction, Weather Guard products mount cleanly on work trucks and vans and stand up to years of hard use. The lineup spans crossover, low-side, and saddle truck boxes, ladder and van racks, drawer units, and fuel and utility tanks, so an entire work vehicle can be outfitted from one brand.
Backed by a strong manufacturer warranty and US-based support, Weather Guard is the name pros trust to protect the tools their livelihood depends on.
Authorized Weather Guard dealer. Prestige Truck is an authorized dealer of Weather Guard, so every tool box, rack and storage product you buy is 100% genuine and factory-new, covered by the full Weather Guard manufacturer warranty, and backed by our own US-based support team.
Compare The Range
How this compares to similar models
The closest alternatives side by side, so you do not have to keep tabs open.
Model
This OneWeather Guard 184 Lo-Side Truck Tool Box, 41 in Bright Aluminum Diamond Plate (184-0-03)
This official Weather Guard overview tours the current truck box lineup and the 1Key UltraLock security system that runs across it. You see how one coded key can open every Weather Guard box on the truck, from saddle to lo-side to hi-side, with a pop-up red button that tells you at a glance whether a box is locked. It highlights the sloped, reinforced lids and the ARMOR TUF powder coat that let these boxes shrug off weather and jobsite abuse. If you run more than one box, or a whole fleet, it shows why keying everything alike saves time every day.
How the 1Key UltraLock System Works
A step-by-step look from Weather Guard at what the 1Key UltraLock actually does: how the cylinder accepts a new code, why the red push button retracts when the box is locked, and how the latch pulls the lid down against the seal.
Worth two minutes before you set the box up.
How to Code Your 1Key UltraLock
Weather Guard's own step-by-step guide shows exactly how to program the 1Key UltraLock on a current 04 Series box. You watch the simple coding sequence that locks every box on your truck to a single key, so you carry one key instead of a ring full. It is the clearest reference for setting up your lock the first time and for adding more boxes to the same key later. Keep it handy when your box arrives, since the locks ship uncoded and are set on first use.
Frequently Asked Questions
Straight answers on specs, fit and support
What bed size do I need for the 184-0-03?
This box is 41" long, the versatile short size, so it fits full-size trucks with rail to spare and fits most mid-size and compact pickups. It mounts on one bed side rail, so measure your usable rail length and confirm clearance behind the cab before ordering.
What is the finish on the 184-0-03?
It is bright aluminum diamond plate finished in Clear ARMOR TUF powder coat, so you get the classic polished-tread look. The clear coat guards against corrosion and fading, it wipes clean easily, and the tread pattern helps disguise day-to-day scuffs.
Will bright aluminum match my truck?
Bright aluminum is the most universal finish, so it looks right on white, silver, gray, red or black trucks and pairs well with chrome and polished trim. It is also the easy resale choice because it never looks dated.
Which side of the bed does it mount on?
You can mount it on the driver or passenger side rail, whichever suits your loading and access. It sits low on the rail, so it keeps the bed floor open and your rear view clear either way.
How does it lock, and is it PowerSync ready?
It uses a one-key high-security push-button lock with drill-resistant keyholes, and it is PowerSync capable, so you can add interior lights and remote keyless entry. You can also code multiple boxes on a truck or an entire fleet to a single key.
Will it keep my tools dry?
Yes. A memory-resistant, multi-ridge weather strip runs the full lid perimeter to seal out rain, dust and debris, the reinforced lid closes tight on a gas strut, and a drain plug lets any moisture escape.
Mark K.
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