Joel631
Verified
06/27/2026
Great features
I bought this box a month ago and is really good
Weather Guard 174 Lo-Side Truck Tool Box, 56" Gloss Black Aluminum Diamond Plate (174-5-03)
$799.00
Regular price
$858.99
Save $59.99
Free gift included with your order
- Guaranteed FitmentTeam-confirmed fit or money back
- No Sales TaxZero sales tax on every order
- 30-Day Money-Back GuaranteeReturn it within 30 days of delivery for a refund
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Fits the same truck
Features
- Lo-Side rail mount: The box rides on top of one bed side rail, low enough to keep your view out the rear window and leave the bed floor free for cargo.
- High-security push-button lock: A One Key push-button lock guards the lid, and its cylinder can be coded so several boxes run on the same key.
- PowerSync ready: The box is prepared for Weather Guard's PowerSync add-ons, such as interior lighting and remote keyless entry, sold separately.
- Gas strut, reinforced lid: A gas strut raises the reinforced lid to roughly 90 degrees and holds it, so one hand is enough to open it.
- Full-perimeter weather seal: A multi-ridge seal runs all the way around the lid, and a drain plug lets out any water that does get in.
- ARMOR TUF powder coat: An ARMOR TUF powder coat guards the finish against corrosion, chipping and fading over the years.
Description & Fitment
This gloss black 174-5-03 is the aluminum diamond plate version of the earlier 56" Lo-Side, coated in black ARMOR TUF. Inside the 56" x 17" x 13" body you get 4.1 ft³ for tools. Choose it if you want the -03 One Key lock in black rather than the newer 1Key UltraLock boxes.
Fitment & Compatibility
| Years | Model | Bed | Notes |
|---|---|---|---|
| 1999-2027 | Silverado 1500 | — | |
| 2001-2027 | Silverado 2500 HD | — | |
| 2001-2027 | Silverado 3500 HD | — |
| Years | Model | Bed | Notes |
|---|---|---|---|
| 1997-2027 | F-150 | — | |
| 2022-2027 | F-150 Lightning | — | |
| 1999-2027 | F-250 Super Duty | — | |
| 1999-2027 | F-350 Super Duty | — | |
| 1999-2027 | F-450 Super Duty | — |
| Years | Model | Bed | Notes |
|---|---|---|---|
| 1999-2027 | Sierra 1500 | — | |
| 2001-2027 | Sierra 2500 HD | — | |
| 2001-2027 | Sierra 3500 HD | — |
| Years | Model | Bed | Notes |
|---|---|---|---|
| 2004-2024 | Titan | — | |
| 2016-2024 | Titan XD | — |
| Years | Model | Bed | Notes |
|---|---|---|---|
| 2011-2027 | 1500 | — | |
| 2019-2024 | 1500 Classic | — | |
| 2011-2027 | 2500 | — | |
| 2011-2027 | 3500 | — |
| Years | Model | Bed | Notes |
|---|---|---|---|
| 2000-2027 | Tundra | — |
Check your fit: this 56" box is on our fitment list for full-size pickups: Chevrolet Silverado 1500, 2500 HD and 3500 HD; GMC Sierra 1500, 2500 HD and 3500 HD; Ford F-150 (Lightning included) and F-250, F-350 and F-450 Super Duty; Ram 1500, 1500 Classic, 2500 and 3500; Toyota Tundra; Nissan Titan and Titan XD. Measure the usable length of your bed side rail before you order.
Not for: mid-size pickups, which are not on this length's fitment list (Weather Guard's 41" Lo-Side is), and flareside or step-side beds (Weather Guard lists the Lo-Side for Style Side beds). Other 174 parts: 174-0-03, 174-0-04, 174-5-04, 174-52-04, 174-6-04. Same length in steel: 175-3-03. Current -04 version: 174-5-04.
About Weather Guard
WEATHER GUARD.
Weather Guard is the truck and van storage brand of Werner Co., the Illinois company also known for its ladders. Its tool boxes are built in the USA, and the line runs from crossover, Lo-Side and gull-wing boxes to chests, underbody boxes, bed drawers, transfer tanks, ladder racks and van shelving.
Weather Guard's current boxes use the 1Key UltraLock, a red push-button lock you can code so one key opens every box on a truck or across a fleet, and many are finished in ARMOR TUF powder coat.
Buying Weather Guard from Prestige Truck. Weather Guard asks for the original sales receipt with any warranty claim, so keep your Prestige Truck order receipt with your records.
Frequently Asked Questions
Will it fit a Silverado 1500?
It is on our fitment list for that truck. Rail lengths vary by bed, so measure the usable length of your side rail against this 56" box before ordering.
Which side of the bed does it go on?
It mounts on one bed side rail, fixed with blind fasteners in drilled holes per Weather Guard's -03 manual. Check that the lid can open fully where you place it.
Do I have to drill my truck?
Yes. Weather Guard's manual for these -03 Lo-Side boxes uses blind fasteners set in drilled holes. On an aluminum bed, coat each drilled hole with zinc-rich primer.
What is PowerSync?
PowerSync is Weather Guard's add-on system for box lighting and remote keyless entry. These boxes are ready for it, and the parts are sold separately.
How does the -03 differ from the -04?
The -03 is the earlier generation, with the One Key push-button lock and PowerSync-ready access. Weather Guard's current -04 Lo-Side boxes carry the 1Key UltraLock coded lock instead.
Can the lock code be changed?
No. Weather Guard's manual warns that once a lock has been coded it stays on that code, so decide which key you want before coding.
Installation
Install time
Not printed on Weather Guard's install sheet
DifficultyNot printed on Weather Guard's install sheet
TypeLo-Side box on one bed side rail, secured with blind fasteners in drilled holes (Weather Guard manual for the 164 to 185 -03 Lo-Side boxes)
Tools9/16" wrench and the blind-fastener installation tool, plus a drill for the mounting holes
Here's the short version. Follow Weather Guard's install sheet (below) for the exact positions and hardware.
- Code the locks with your key before first use. Once a lock is coded it cannot be changed. Lock and unlock it to test.
- Mount the box with the supplied bolt kit, using the blind fasteners and 5/16" flat washers at the truck box rail as shown in the figures.
- On an aluminum bed, use the aluminum upfit parts and coat every drilled hole with zinc rich primer.
Stuck on a step?
Specifications
| Brand | Weather Guard |
|---|---|
| Part Number | 174-5-03 |
| Generation | Previous generation (-03) |
| Box type | Lo-Side (side-rail) box, single lid |
| Lock | One-key high-security push-button, keyed alike, PowerSync ready |
| Lid | Reinforced, gas strut, opens to about 90 degrees |
| Weather seal | Full-perimeter, multi-ridge |
| Drainage | Drain plug |
| Electrical | 12V access, PowerSync capable |
| Width x height | 17" W x 13" H |
| Mounting | On one bed side rail, blind fasteners in drilled holes |
| Country of origin | USA |
| Series | 174 Series Lo-Side box, previous generation (-03) |
| Length | 56" |
| Material | Aluminum |
| Finish | Gloss Black ARMOR TUF powder coat |
| Exterior dimensions | 56" L x 17" W x 13" H |
| Capacity | 4.1 ft³ |
| Shipping weight | 44.4 lb |
| Warranty | Weather Guard Limited Lifetime |
| UPC | 783965056847 |
More media
3 videosWarranty, shipping & returns
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Warranty
Weather Guard backs this box with its Limited Lifetime Warranty, issued by Werner Co.: the box is warranted against defects in material and workmanship for its expected lifetime, counted from the day you buy it.- Only the original purchaser is covered, and coverage ends if the box passes to a new owner.
- Every claim needs a copy of the original sales receipt, so keep your Prestige Truck order receipt with your records.
- Werner Co. picks the remedy: it repairs the faulty part or replaces the whole box at no charge for parts or labor, or it may refund what you paid or issue a credit toward a new Weather Guard product.
- Not covered: normal wear and tear, cosmetic rust, scratches, accident damage, repairs Werner Co. did not authorize, misuse, overloading, or a box that was not mounted or used as Weather Guard's written instructions describe. Damage to what is stored in the box or to the vehicle is excluded too.
- Where the law allows, Werner Co. accepts no liability for incidental, special, indirect or consequential damages, economic loss included. This is the only express warranty on Weather Guard products, and no dealer can change it.
- Report a problem promptly once you find it. To start a claim, contact us with your order number and photos of the issue, and we will take it up with Weather Guard for you.
-
Free shipping
Ships free to the lower 48 states, with no minimum order.- Order by 5 PM ET on a business day and it starts processing the same day.
- Most orders arrive within 1-5 business days.
- We email your tracking number as soon as it ships.
-
Inspect on delivery
Make sure both keys and the hardware kit with its blind fasteners and installation tool are in the carton, and check the seal and finish before the box goes on the rail. Check it as soon as it arrives.- Look for crushed ends, punctures or tears in the carton.
- If something looks wrong, take photos of the box and the parts (and if a driver asks you to sign, note the damage on the receipt).
- Open the box and check the parts against the parts list before you install.
- Email support@prestigetruck.com right away with your order number, a short note and photos. We send a replacement or a full refund at no cost to you.
-
30-day returns
Return it within 30 days of delivery, unused, in the original packaging, with proof of purchase.- Email support@prestigetruck.com with your order number. We reply within 1-2 business days with instructions.
- Damaged, defective or wrong item: we send a prepaid label or arrange a pickup.
- Changed your mind: you pay return shipping. No restocking fee.
- Refunds go back to your original payment method within 7 business days of approval. See our returns policy.
What our customers say
4.8 · 16 reviews
Andrew
Verified
06/25/2026
Only weather guard
Great quality product. I use weather guard on every truck I have
Stanhope98
Verified
03/14/2026
You can fit more in it than expected, good for easy access.
Easy to install, just need a drill and a wrench.
Redvol
Verified
07/01/2026
Great Product
I've had several of these boxes and they are dependable, Instruction on bolt installation is a little vague. The black gets hot in the summer.
22Twain
02/13/2026
Manage your expectations
I didn’t follow the directions. I wanted to keep my ability to load 4X8 sheets, so I adjusted the placement of the rear support bracket. The other side was connected to my cross box. Didn’t use some of the hardware provided. Bought my own. When you buy weather guard boxes, you are paying for the quality of the mechanisms. Btw, not a fan of the Defender series. Good luck
Mike VB
Verified
12/19/2025
Good quality
Second set we bought and we live the quality
Tikki
Verified
08/14/2025
Truck Box
Nice Solid Box just what we needed for everyday use
Yotehtr2
Verified
08/11/2025
The best boxes available
Weatherguard makes the best boxes you can buy. I've been using them for 20+ years in oil and gas and yet to break one. They seal up watertight. Great boxes
HomeDepotCustomer
Verified
02/12/2025
These are very well made. I found the mounting to be a little bit of a pain in the rear, not really clear instruction just a bunch of nuts and bolts in a bag in the end it came out great and is solid as a rock.
Emajeb
Verified
12/31/2024
Best tool box for trucks
Weather Guard tool boxes are the best. That is all we use in our trucks.
Billyboy2003
Verified
08/26/2024
Very well made!
I have another brand on my 5 other trucks and was not real happy with them, so I thought I would try something different. These are by far better made and appear to be heavier gauge material. We will see how they hold up long term, but I am very happy with what I see so far!!
BrettPainter
Verified
06/05/2024
Just what I needed
Perfect! Fits exactly right.
3t trucking
Verified
06/02/2024
Weatherboard side mount tool box
I bought weatherboard side boxes, to add to a cross box installed years ago. I appreciate the construction quality and these didn’t disappoint. Easy to install and they hold a lot of tools.
Brad
Verified
08/04/2026
Truck boxes
Opened the box and it had a dent in it. One tool box didn’t come with keys
fleetmanes
Verified
08/14/2025
Tool Box
Bought a couple of weeks ago, seems sturdy and like the front lock instead of the side. Put one on each side of the truck. don't like the brackets on the side, they keep from being able to slide plywood or other 4' wide items under the box, but understand they are needed to support the weight of the box
Treyvor
Verified
06/23/2025
The toolbox was shipped very quickly and you can't beat...
The toolbox was shipped very quickly and you can't beat the free shipping on it. The quality of the box is great overall but I do question the seals on the box. Its done a great job keeping out moisture but there is a lot of dust getting in the box.