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Tuffy Security Products Underseat Lockbox with Keyed Lock; Full Length (07-19 Sierra 3500 HD Crew Cab)Find parts that fit my vehicle

Item SHG19720
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109 Reviews
Our Price

$549.00

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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation

      Features & Specs

      • Under Rear Seat Lockbox
      • Storage Capacity- 4,500 Cubic Inches
      • Double-Bitted, 10 Tumble Lock
      • 56” x 13” x 8” (Front), 6” (Back)
      • Built-In Weather Seals
      • Inventive Pry-Guard Locking System
      • 16 Gauge Welded Steel Construction
      • Fusion Bonded Epoxy Powdercoat Finish
      • Uses OEM Hardware
      • No-Drill Installation
      • Limited Lifetime Warranty
      • Fits all 2007-2019 Sierra 3500 HD Crew Cab Models

      Description

      Protect Your Belongings. If you frequently use your late model Sierra 3500 for work yet you do not have a safe storage location for your precious belongings, consider installing Tuffy’s Under Rear Seat Lockbox. The lock box not only protect your items from prying eyes but also from itchy fingers by keeping those items safely tucked away under the rear seat. Built-in weather seals, a double-bitted, 10 tumble lock, and a pioneering Pry-Guard locking system guarantee the safety of your items.

      Limitless Space. Tuffy Under Rear Seat Lockbox provides you more than 4,500 cubic inches of secure storage space. Tuffy designed this safety box to run the entire length of your Sierra’s rear seat thus offering you limitless space to store your valuables.

      Welded Steel Construction. Tuffy’s rear seat lockbox comes with 1/8” thick components made from pure welded steel. It is literally foolproof and guarantees maximum safety for your items. A fusion bonded powder coat finish offers protection from corrosion and rust. Its lid is also weather resistant for maximum protection.

      No-Drill Installation. Tuffy designed this lock box to use your Sierra’s OEM hardware. Therefore, no drilling or welding is required during installation. Mounting brackets are included thus making installation easier. You need basic mechanical skills to install this lockbox.

      Warranty. Tuffy provides a limited lifetime warranty that covers materials and structural defects.

      Application. Tuffy Under Rear Seat Lockbox is compatible with all 2007-2019 Sierra 3500 HD Crew Cab models.

      Fitment:

      Details

      Tuffy Security Products 307-01

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      Installation & What's in the Box

      Installation Info

      Installation Time

      (approx) 1 Hour

      Difficulty Level:

      Simple installation for anyone.

      Installation Guides

        No guide available for this part yet.

      What's in the Box

      • (1) Under Rear Seat Lockbox
      • Set of Keys
      4.8

      Customer Reviews (109)

      Review Summary

      5 Stars81%4 Stars17%3 Stars2%
      4.8 out of 5 overall ratings from 109 customers

      Mar 16, 2025

      Review shared from Tuffy Security Products Underseat Lockbox with Keyed Lock (15-25 F-150 SuperCab, SuperCrew)

      5
      2023 -
      Installation Time: Less than 1 Hour

      Great product!

      I love this lock box! It’s got decent space and fits my plate carrier, gun belt, helmet, rifle, night vision, and also my battery box. So much room for activities!

      Fit 5/5
      Quality 5/5
      Bang For Your Buck 5/5

      Feb 23, 2025

      Review shared from Tuffy Security Products Underseat Lockbox with Keyed Lock (19-25 Sierra 1500 Double Cab, Crew Cab)

      4
      2024 -
      Installation Time: Less than 1 Hour

      Underseat Lockbox

      The Tuffy Sercurity Underseat Lockbox is well built and fits perfect. The only problem is that I think it is overpriced.

      Fit 5/5
      Quality 5/5
      Bang For Your Buck 3/5

      Dec 18, 2024

      Review shared from Tuffy Security Products Underseat Lockbox with Combo Lock (15-25 F-150 SuperCrew w/o Floor Mounted Sony Subwoofer)

      5
      2016 Platinum - Zace135
      Installation Time: Less than 1 Hour

      Perfect fit

      Amazing storage box with added security for whatever you may want to lock up. It is a Quality made product. All hardware was included very easy to install.

      Fit 5/5
      Quality 5/5
      Bang For Your Buck 5/5

      Nov 24, 2024

      Review shared from Tuffy Security Products Underseat Lockbox with Keyed Lock (19-25 Silverado 1500 Double Cab, Crew Cab)

      3
      2024 LTZ - Underseat
      Installation Time: Less than 1 Hour

      Under seat lockbox

      This is my 2nd box the same problem I had with 1st one is the same I have with the 2nd one the lock is not that sung fit .For security it is easy to pry open.So for a secure lock I Will put a latch and a lock on it

      Fit 5/5
      Quality 3/5
      Bang For Your Buck 3/5

      Oct 13, 2024

      Review shared from Tuffy Security Products Underseat Lockbox with Keyed Lock (19-25 Sierra 1500 Double Cab, Crew Cab)

      5
      2021 Elevation - TrumpVance
      Installation Time: Less than 1 Hour

      Fits great

      So the box is awesome. However when I got my package all the hardware was in the box. However so was the paper that said what the code was to unlock it. Lucky I just tried all zeros and it unlocked them. But that’s all I have to say bad and I’m not sure if that’s on this company or the manufacture of the box. Also I ordered foam from Amazon I have coming to line it with foam you’ll need it for sure. Also added led light strips to my box so I can see in it.

      Fit 5/5
      Quality 5/5
      Bang For Your Buck 4/5

      Sep 28, 2024

      Review shared from Tuffy Security Products Underseat Lockbox with Keyed Lock (15-25 Canyon Crew Cab)

      5
      2021 AT4 - GuyWhite
      Installation Time: Less than 1 Hour

      Lockable cab storage for Colorado

      This is one of those products that just works well and solves the problem. There's no secure storage anywhere in the cab of the Colorado, until now! Relatively easy to install, fits perfectly, offers plenty of useful space, and is basically invisible to everyone. It's very well constructed and actually improves the looks of the second row by providing seamless support for the rear seat. The 60/40 split locking cover is very useful and matches the seat split for easy access. I had to purchase a T47 Torx head bit to get the factory seat support bracket out, but that's it. It's a little bit spendy but well worth it.

      Fit 5/5
      Quality 5/5
      Bang For Your Buck 4/5

      Jul 1, 2024

      Review shared from Tuffy Security Products Underseat Lockbox with Keyed Lock (17-25 F-250 Super Duty SuperCab)

      5
      2020 - GaD
      Installation Time: Less than 1 Hour

      gun safe

      ez to install great fit i have had it for three year s now

      Fit 5/5
      Quality 5/5
      Bang For Your Buck 5/5

      Mar 16, 2024

      Review shared from Tuffy Security Products Underseat Lockbox with Keyed Lock (19-25 Silverado 1500 Double Cab, Crew Cab)

      5
      KevinCow
      Installation Time: Less than 1 Hour

      Under seat lockbox

      Fits perfectly under my back seat on my 2021 Chevy Silverado and easy install and now able to lock things up .

      Fit 5/5
      Quality 5/5
      Bang For Your Buck 5/5

      Mar 9, 2024

      Review shared from Tuffy Security Products Underseat Lockbox with Keyed Lock (19-25 Silverado 1500 Double Cab, Crew Cab)

      5
      2022 LTZ - Viking874
      Installation Time: Less than 1 Hour

      Tuffy Underseat lockbox

      Excellent quality. Excellent fit. Easy installation.

      Fit 5/5
      Quality 5/5
      Bang For Your Buck 5/5

      Jan 21, 2024

      Review shared from Tuffy Security Products Underseat Lockbox with Keyed Lock (19-25 Silverado 1500 Double Cab, Crew Cab)

      5
      2023 LT Trail Boss - PatrickK
      Installation Time: Less than 1 Hour

      Easy instal and does the trick

      This box is secure and easy to install. The size is moderate and can secure the necessities.

      Fit 5/5
      Quality 5/5
      Bang For Your Buck 4/5

      Questions & Answers

      No questions about this product yet. Ask the First Question

      Will It Fit My Sierra 3500

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          Sierra 3500 Wheel & Tire Gallery

          Sierra 3500 Wheel & Tire Builds
          See Sierra 3500 Wheel & Tire Gallery ( photos)

          Word on the Trail

          Great products and great website. I like seeing what the product looks like on a truck like mine prior to purchase and they do this.

          khoopingarner1974
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