UnderCover SwingCase Truck Bed Toolbox Review – Easy Access, Secure Storage

Truck owners know one thing for sure—no matter how big the bed is, storage is always a challenge. Small tools, tow straps, jumper cables, and even cleaning supplies often roll around the back, getting wet or lost under larger cargo. That’s where a dedicated storage solution makes life easier.

The UnderCover SwingCase Truck Bed Storage Box (SC104D) is designed exactly for that purpose. Built for the 2019–2023 Chevy Silverado and GMC Sierra 1500 (driver side), this lockable, swing-out storage box promises to keep your gear secure, dry, and within arm’s reach. Unlike traditional toolboxes that eat up bed space or require you to climb in and out, the SwingCase pivots over the tailgate, making access simple.

I’ve personally used and tested this storage box on a Silverado, and I can confidently say it’s not just another add-on—it’s a clever, space-saving upgrade that feels like it should come standard with every truck. Let’s break down what makes it stand out, where it shines, and where it could improve.

UnderCover SwingCase SC104D Review

1. Smart Swing-Out Design

The biggest highlight of the SwingCase is its pivoting arm system. With a simple pull of a latch, the box swings 180 degrees over the tailgate, letting you grab tools without crawling into the bed. When not in use, it locks back securely against the sidewall. Truck forums are full of praise for this feature—owners love how it turns “dead space” above the wheel well into usable storage.

2. Durable Build & Weather Resistance

Made from ABS composite material, the SwingCase is lightweight yet tough. It holds up well against daily wear, mud, and rain. While some users reported that the lock isn’t as heavy-duty as a steel toolbox, most agree it does a solid job keeping gear safe from casual theft and weather exposure. Many reviews highlight how the rubber seal around the lid keeps water and dust out, even during long road trips.

3. Ample Storage Capacity

Each SwingCase can hold up to 75 lbs of tools and gear. The interior isn’t massive like a chest toolbox, but it’s well-organized for essentials—tow straps, ratchet sets, first-aid kits, and even groceries fit comfortably. On forums, truck owners often pair a driver-side box with a passenger-side one for maximum balance and storage.

4. Easy Installation

One of the main selling points is its DIY-friendly install. It bolts into the bed using existing holes, requiring no drilling in most models. Multiple Amazon reviewers mentioned finishing the install in under 30 minutes with basic tools and gear. It also detaches easily if you need full bed access for hauling larger cargo.

5. Space-Saving Advantage

Unlike bulky toolboxes that eat up precious cargo space, the SwingCase sits snugly above the wheel well. You don’t lose floor space, which is crucial for hauling. Many Silverado and Sierra owners say this was the deciding factor—finally, a way to store essentials without giving up bed bedroom.

6. Secure & Lockable

The SwingCase features a built-in lock, giving extra peace of mind. While it’s not Fort Knox, it does deter casual snooping. Some users recommend adding a bed cover or tonneau for an added security layer if storing expensive tools.

Pros

• Clever swing-out design for quick access
• Lightweight yet durable ABS material
• Weather-resistant with rubber seal
• Easy, no-drill installation
• Space-efficient, fits snugly over wheel well
• Lockable for added security

Cons

• Limited storage compared to large toolboxes
• Lock could be stronger for high-value tools
• Slightly pricey if buying both driver & passenger sides
• Some users reported missing handles or minor fit issues

Why Do You Need the UnderCover SwingCase?

Owning a truck is all about versatility, but that open bed can quickly turn into a disorganized, noisy, or even unsafe space when smaller items are left rolling around. The UnderCover SwingCase solves this issue by giving you a dedicated, secure, and weather-resistant storage solution without eating up valuable bed space.

Here are the main reasons why you might need it:

• Organization Made Simple – Instead of digging around for scattered tools or gear, everything stays in one place.
• Quick Accessibility – The swing-out design lets you grab what you need without climbing into the bed.
• Weather Protection – Keeps items safe from rain, dust, and snow—something a simple tote box can’t guarantee.
• Better Security – The lockable latch means your valuables are safer than leaving them loose or in the cab.
• Maximized Bed Space – Unlike bulky toolboxes that take over half your truck bed, the SwingCase tucks neatly against the fender wall.
• Custom Fit for Silverado/Sierra – Engineered specifically for these trucks, so it looks OEM and doesn’t feel like an afterthought.
• Perfect for Everyday Essentials – Jumper cables, tow straps, emergency kits, or even groceries won’t slide around or spill anymore.
• Work + Play Ready – Contractors use it for small tools, while campers and hunters keep gear and accessories locked inside.

In short, the SwingCase isn’t just a storage box—it’s about making your truck more functional, secure, and hassle-free for daily driving or heavy use.

Real-World Experience & Community Feedback

From what I’ve seen in forums and Amazon reviews, the SwingCase is a favorite among Silverado and Sierra owners who use their trucks daily. Here’s what stands out in real use:

• Easy DIY installation – most users report installing it in under 30 minutes with basic tools.
• Space efficiency – it uses the dead space near the fender well, so you don’t lose bed capacity.
• Durability – built from tough ABS plastic that handles heavy tools, sports gear, and everyday items.
• Security – the lock and latch mechanism keep valuables safer than leaving them exposed.
• Mixed feedback – a few users felt the locking system could be sturdier, and others noted it slightly narrows bed space when hauling oversized cargo.

Overall, owners agree it’s a game-changer for the organization, especially for people who dislike messy truck beds.

Who Should Buy the UnderCover SwingCase?

This product isn’t for everyone, but if you fit into one of these categories, it’s worth serious consideration:

• Everyday truck users – If you drive a Silverado or Sierra daily and carry essentials like tools, cables, or groceries, this box keeps things clean and secure.
• Outdoor adventurers – Hunters, campers, and fishers love it because they can store gear that would otherwise rattle or get lost in the bed.
• Work truck owners – Contractors or tradespeople can keep smaller tools handy without installing a full-size toolbox.
• Family drivers – If you also use your truck for family outings, it’s perfect for storing blankets, snacks, or emergency supplies.

In short, if you want secure, accessible, and space-saving storage without permanently losing bed space, the UnderCover SwingCase is a solid investment.

Simple Installation Guide for UnderCover SwingCase

Installing the SwingCase is straightforward and doesn’t require advanced skills. Here’s a step-by-step guide:

1. Gather Tools – You’ll need a cordless drill, 9/64” drill bit, 7/16” socket bit, and a marker or Sharpie. All hardware comes included.
2. Position the SwingCase – Place it on the driver or passenger side of the bed and ensure it aligns properly with the wheel well and tie-down points.
3. Mark Drill Points – Use a marker to indicate where the screws will go, making sure the case clears your tonneau cover or tailgate.
4. Pre-Drill Holes – Drill pilot holes at your marked points to avoid shifting during installation.
5. Secure Hinges – Attach the main hinge with the provided screws, making minor adjustments to ensure the swing latch operates smoothly.
6. Install Striker Bracket – Hold it under the case, verify alignment, then secure the screws.
7. Test Swing Function – Pull the release lever and ensure the box swings smoothly over the tailgate. Adjust if necessary.
8. Lock & Final Check – Close the lid, lock it, and confirm everything is stable. Installation should take under 30 minutes.

Frequently Asked Questions (FAQ)

Can the SwingCase be used with all tonneau covers?

Yes, it works with soft, hard, folding, and rolling tonneau covers, maintaining a 3-inch clearance for smooth operation.

How much weight can the SwingCase hold?

It safely holds up to 75 lbs of tools, gear, or personal items.

Can I remove it if I need full bed space?

Absolutely! It’s fully removable and reinstallable in seconds without special tools.

Is the box weatherproof?

Yes, the lid features a moisture-resistant seal to keep contents dry from rain, snow, or dust.

Is it lockable?

Yes, the key-lockable lid provides additional security for tools or valuable items.

Final Verdict

The UnderCover SwingCase is a clever, compact, and versatile storage solution for Silverado and Sierra truck owners. Its swing-out design, custom fit, and secure lockable lid make it perfect for contractors, weekend warriors, and anyone who wants a tidy, accessible truck bed.

While it may slightly reduce bed width for very large items, the convenience, durability, and organized storage it offers far outweigh this minor limitation.

If you want quick access to your gear, better truck bed organization, and peace of mind knowing your tools are protected, the SwingCase is a smart investment for your truck.