Under Rear Seat Lockbox - GM Truck Crew Cab
SKU: 307

Under Rear Seat Lockbox - GM Crew Cab Truck  - Tuffy
  • Over 3500 Cubic inches of lockable storage space
  • Exclusive 10 tumbler double bitted lock with built in weather seals
  • Pry-Guard locking system featuring 1/8" thick welded steel components
  • Stealthy design is hidden under the seat from prying eyes
  • Welded 16 Gauge steel construction
  • Weather resistant lid design incorporates an exclusive hinging system with built-in lid stop
  • Added security with Pin-Lock hinge design
  • Innovative mounting system permits removal from vehicle in seconds from inside the box when unlocked without the need for tools
  • Durable texture powder coat finish
  • Mounting hardware provided
  • Quick and easy install, no drilling
  • Weather & dust seal
  • Chamfered corners are incorporated into the design for easier passenger access


Part #: 307

Colors: Black

Exterior Dimensions: Overall 13” L x 55 7/8” W x 7”-5” H (Height is tapered front to back)

Interior Dimensions: 12 3/8” L x 55 1/4” W x 5 1/2” - 3 5/8” H (Height is tapered front to back)

Lid Opening: 11” L x 35 1/8” W Large lid & 19 1/8” W Smaller lid

Shipping Weight: 51 lbs.

Product Description

This high security 16 gauge steel security lockbox mounts under the rear seat in a GM Crew Cab Truck. The full width formfitting design of the Tuffy lockbox has over 3500 cubic inches of lockable storage. It’s secured contents are easily accessed by flipping either or both of the rear seat(s) up and opening the corresponding lid(s). The unique design allows the full width to be used to stow firearms or other long items.

Featuring Tuffy’s Pry-Guard Locking System with a 10 tumbler double bitted security lock with built in weather seals. Chamfered corners are incorporated into the design for easier passenger access.

The innovative mounting system is only accessed from inside the box. When additional floor space is needed the entire lockbox can be removed in seconds without the need for any tools. Mounts inconspicuously under the seat out of apparent site of would be thieves. Is quickly and easily installed using the factory hardware without drilling.



  • Chevy Silverado 1500 Crew Cab 2007-2018
  • Chevy Silverado 2500/3500 Crew Cab 2007-2019
  • GMC Sierra Crew Cab 2007-2018
  • GMC Sierra 2500/3500 Crew Cab 2007-2019
  • (Fits Crew Cab only and does not fit Double and Regular Cab)


No Drilling required. Fastens with original OEM hardware. View Assembly Instructions PDF
Customer Reviews
# of Ratings: 3
1. on 3/7/2020, said:
Great product. Heavy duty construction will last forever. very easy install. My only complaint was the keys and mounting brackets were locked inside the storage box when received. Tuffy had to send new keys to open the box for the install. Great customer service. Highly recommended
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2. on 2/21/2019, said:
They need better quality control! Box looks and feels sturdy, however, the center locking plate was welded backwards which allows the center of the lid to lift up approximately 1 inch!!!!!!!
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(21 people found this comment helpful, 2 did not)
3. on 8/23/2018, said:
Really good build quality, and you can't even see it from the outside. It looks like it's part of the truck seat. Installation was easy, took only a few minutes. Shipping was very quick. My only complaint is the packaging. When I received it, all the bolts/nuts were loose inside the box.
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(24 people found this comment helpful, 1 did not)
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