Add locking side-rail storage without paying for the newest generation with the Weather Guard 174-5-03 lo-side truck tool box. This 56" box wears a deep gloss black ARMOR TUF finish over aluminum diamond plate. Gloss black turns a plain work box into a finished, blacked-out upgrade with a deep shine that stands out against a bright bed. 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 4.1ft³ 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:
174 Series 56" Lo-Side aluminum truck tool box in gloss black
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
56" of Secure Side-Rail Storage At 56" long the 174-5-03 runs along one bed side rail and gives you 4.1ft³ of lockable, organized storage while keeping the rest of the bed floor clear. It carries a full day of hand and power tools without taking over the bed.
Gloss Black Diamond Plate Finish A Gloss Black ARMOR TUF powder coat wraps the aluminum diamond plate in a deep, glossy black that fights chips, road salt and UV fade. It gives a working truck a finished, blacked-out look without the added weight of steel.
Blacked-Out Curb Appeal Gloss black is the go-to for a modern, blacked-out truck, and it ties in with black bumpers, black wheels and black trim packages. The deep gloss reads as an upgrade over plain aluminum without adding the weight of steel.
Previous-Generation Value, PowerSync Ready As the previous-generation redesigned Lo-Side, the 174-5-03 comes in below the price of the latest 1Key UltraLock version while still bringing a high-security push-button lock and PowerSync ready wiring. It is welded aluminum diamond plate, made in the USA and backed by a Weather Guard Limited Lifetime Warranty.
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.
Low-Side Rail Mount The Lo-Side design sits on top of one bed side rail and stays low, so it does not block your rear window and leaves the bed floor open for hauling. It mounts on either the driver or passenger side rail, whichever suits your loading.
● Usually yes, measure your side rail length first
Mid-size
-
Ranger, Colorado, Tacoma, Frontier
● Often fits, measure the usable rail length before ordering
Fit guidance: Lo-Side boxes mount on top of one bed side rail, so they keep the bed floor open and leave the rest of the bed clear for cargo. At 56" long this box fits most full-size 6'6" and 8' beds with room to spare, fits many full-size 5'6" short beds, and fits a lot of mid-size trucks. 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.
Specifications
Series: 174 Series Lo-Side
Style: 56" single-lid side-mount (Lo-Side)
Storage Capacity: 4.1ft³
Exterior Dimensions: about 56"L x 17"W x 13"H
Material: Welded aluminum diamond plate
Finish: Gloss Black ARMOR TUF powder coat
Lid: Reinforced, opens to about 90 degrees, gas strut
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 44.4 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, best done with two people because of the length
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. Because the box is long, have a second person help lift and steady it while you clamp it down. Follow the Weather Guard installation instructions for exact clamp placement and torque.
Watch the installation walkthrough:
Resources
Everything you need for your Weather Guard 174 Lo-Side Truck Tool Box, 56" Gloss Black 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 174 Lo-Side Truck Tool Box, 56" Gloss Black Aluminum Diamond Plate (174-5-03)
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 174-5-03?
This box is 56" long and mounts on one bed side rail, so it fits most full-size 6'6" and 8' beds easily, fits many 5'6" short beds, and fits a lot of mid-size trucks. Measure your usable side rail length and confirm clearance behind the cab before ordering.
What is the finish on the 174-5-03?
It is aluminum diamond plate finished in Gloss Black ARMOR TUF powder coat for a deep, glossy blacked-out look. The powder coat resists chips, salt and fading, and it pairs well with black trim and blacked-out trucks.
Who is the gloss black finish for?
Gloss black is the pick for a blacked-out build, and it ties in with black wheels, black trim and black bumpers. It shows a little more dust and fingerprints than matte, but the deep shine reads as a premium upgrade.
Does it require drilling to install?
No. The box ships with under-rail clamps and hardware, so it mounts on top of either bed side rail without drilling into your truck. Most installs take about 20 to 30 minutes, and a second person makes the longer box much easier to lift and hold while you clamp it down.
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.
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.
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