Herb
Verified
07/13/2025
This was the tenth set of boxes we purchased and have loved everyone of them.
This was the tenth set of boxes we purchased and have loved everyone of them.
Weather Guard 391 Super Hi-Side Truck Tool Box, 90 in Black Aluminum (391-5-02)
$1,612.00
Regular price
$2,220.99
Save $608.99
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
- Aluminum doors and hinges: Every model, steel bodies included, hangs its doors on aluminum hinges with aluminum door panels, which trims weight and will not rust the way bare steel can.
- Rain gutter and weather seal: A gutter above each door opening channels rain away, and a ribbed D-shaped seal that resists taking a set closes the gap around the door to keep tools dry.
- Tool-free QuickClip doors: QuickClips let you set each door to swing out to 90 degrees or fold back to 180 degrees, and you change it by hand with no tools.
- Drill-resistant lock: Each door locks with a D-handle latch over a drill-resistant lock core, and a three-point latching system holds the door at several spots, not just one.
- Removable parts bin: A lift-out parts bin keeps screws, fittings and small hand tools sorted, and you can pull it out to carry to the job.
- Reinforced, welded build: Weather Guard welds the body and reinforces the lids with C-channel, rating the line for maximum durability with extreme security.
Description & Fitment
Part 391-5-02 pairs a 90" Super Hi-Side body of aluminum diamond plate with gloss black ARMOR TUF powder coat. Inside the 90.25" L x 16.25" W x 18" H shell you get 15.2 ft³ of storage, at 85.5 lb. Its side doors each clear 14.75" H x 42" W for loading.
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 |
|---|---|---|---|
| 2011-2027 | 1500 | — | |
| 2019-2024 | 1500 Classic | — | |
| 2011-2027 | 2500 | — | |
| 2011-2027 | 3500 | — |
Check your fit: this 90" box is on our fitment list for 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. Weather Guard lists the line for Style Side beds; measure the usable length of your bed side rail before you order.
Not for: flareside or step-side beds, mid-size pickups (none are on this box's fitment list), and Toyota Tundra or Nissan Titan, which are not on the fitment list for the 90" and 96" lengths (the 64" and 72" boxes list them). Other 391 finishes: 391-0-02, 391-3-02, 391-52-02. Other 90" boxes: 290-3-02 or 291-3-02 or 390-0-02 or 390-5-02. Not for mounting on a ladder rack.
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. Bed rails differ by bed length, so measure the usable length of your side rail against this 90" box (90.25" overall) before ordering.
Will it fit a Toyota Tundra or Nissan Titan?
Those trucks are not on our fitment list for the 90" length. The 64" and 72" Hi-Side boxes list them.
Do I have to drill my truck?
Yes. Weather Guard's sheet has you drill 3/8" holes in the box and 1/2" holes in the bed floor, where blind fasteners anchor the two legs, and a stake pocket under a J-bolt line may need its own 1/2" hole. Look under the bed for fuel lines, the tank and wiring before drilling, and on an aluminum bed coat the holes with zinc-rich primer.
Can I mount it on a ladder rack or a stake bed?
Not on a ladder rack: Weather Guard warns that bolting this box to a rack will damage its structure. In a pickup it must go on with the supplied legs. On a stake bed the pickup steps do not apply, and the box needs its bottom fully supported or structural mounting instead.
How do the QuickClip doors work?
Each door has QuickClips that set it to stop at 90 degrees or swing all the way to 180 degrees. You switch between the two by hand, with no tools needed.
Steel or aluminum?
Weather Guard builds both on the same layouts. Steel adds weight: the 90" steel 290 is listed at 124 lb, while the aluminum 390 of the same size and 11.1 ft³ is 74 lb. Several steel models list a 14-ga or 16-ga body.
Installation
Install time
Not printed on Weather Guard's install sheet
DifficultyNot printed on Weather Guard's install sheet
TypeHi-Side box on top of one bed side rail, set on mounting pads and held by two legs bolted to the bed floor with blind fasteners in drilled holes, plus J-bolts hooked under the bed lip (Weather Guard Hi-Side and Super-Side installation instructions 24-0295)
Toolselectric drill with 3/8" and 1/2" bits, two 1/2" and 9/16" open or box wrenches, carpenter's square, tape measure, tape, marker and a utility knife
Here's the short version. Follow Weather Guard's install sheet (below) for the exact positions and hardware.
- Park as level as you can. Turn the box over and mark a 6" line 7/8" in from each end (extra center lines on the long models listed on p3).
- Tape the mounting pads to the bed rail. Set the box on the rail, support the rear, square and level it.
- Hold each leg square near the rear corner and mark the leg holes on the box and the bed floor; mark where the bed lip meets the box underside and any stake pocket.
- Remove the box. Drill box marks 3/8" and floor marks 1/2", set the blind fasteners in the floor, and bolt the legs to the box.
- Fit the J-bolts with the retaining washer, fender washer and nylon lock nut (nut 1/4 turn into the nylon), then set the box on the truck.
- Bolt the leg feet to the floor and turn the J-bolts under the bed lip. On aluminum beds use vinyl tape between J-bolt and bed. Never bolt this box to a ladder rack.
- Installation Instructions (PDF)
- Weather Guard 391 Super Hi-Side Truck Tool Box, 90" Black Aluminum installation manual (PDF)
Stuck on a step?
Specifications
| Brand | Weather Guard |
|---|---|
| Part Number | 391-5-02 |
| Box type | Hi-Side (bed-rail) box with side-opening doors |
| Doors | Two, aluminum doors and hinges, QuickClip 90 or 180 degree setting |
| Lock | D-handle latch, drill-resistant lock core, three-point latching |
| Key alike | On request |
| Weather protection | Rain gutter plus memory-resistant D-shaped ribbed weather strip |
| Lid construction | Heavy-duty C-channel reinforced |
| Construction | Heavy-duty welded |
| Organizer | Removable parts bin |
| Mounting | On top of one bed side rail, legs bolted to the bed floor |
| Bed style | Style Side |
| Country of origin | USA |
| Series | 391 Series Super Hi-Side box |
| Length | 90" |
| Box style | Super Hi-Side Box |
| Material | Aluminum diamond plate |
| Finish | Gloss black ARMOR TUF powder coat |
| Exterior dimensions | 90.25" L x 16.25" W x 18" H |
| Capacity | 15.2 ft³ |
| Door opening | 14.75" H x 42" W (each door) |
| Weight | 85.5 lb |
| Shipping dimensions | 90.88" L x 17.19" W x 18.38" H |
| Shipping weight | 85.5 lb |
| Warranty | Weather Guard Limited Lifetime |
| UPC | 783965038560 |
Warranty, shipping & returns
-
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
Before mounting, check the carton for both legs, the mounting pads, the J-bolts and the bolt kit, then open each door to check its seal, latch and QuickClips. 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
4.7 · 7 reviews
HomeDepotCustomer
Verified
05/21/2025
The finish on the boxes is extremely nice. The latch...
The finish on the boxes is extremely nice. The latch system is one of the best for ease of use and security. The locks are difficult to get the key in and out, that's the only drawback
Mike
Verified
02/18/2025
They work really well ...
They work really well
Eric
Verified
12/29/2024
These boxes are heavily built and perform great. The...
These boxes are heavily built and perform great. The handles work perfect. Great product.
Anonymous
07/25/2024
Truck box
Good quality product Strong and durable Worth the money
TOD
Verified
03/13/2024
took way to long to get this item why? no communication as to why it took so long....
Lee Bartel
12/24/2024
Latch problems
The spring clips on the latch rod pull through the hole in rod. The rod falls off and locks side box we replace them