DU-HA 10044 Features: Keeps Everything Organized Under The Seat Safely Stores Valuables Out Of Sight Acts As A Legal Gun Case In Most States Virtually Indestructible Easy Installation All Models Come With Gun Rack/Organizers 30 Day Money Back Guarantee Lifetime Warranty Height: 8.00 Width: 17.75 Length: 56.25 Weight: 16.00 lbs Fitment: 2014/GMC/Sierra 3500 HD/WT Crew Cab Pickup 4-Door/6.6L 400Cu. In. V8 DIESEL OHV Turbocharged::Dark Gray is recommended for Work Truck (WT) models^^2014/GMC/Sierra 3500 HD/WT Crew Cab Pickup 4-Door/6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated::Dark Gray is recommended for Work Truck (WT) models^^2014/GMC/Sierra 3500 HD/WT Crew Cab Pickup 4-Door/6.0L 5967CC 364Cu. In. V8 FLEX OHV Naturally Aspirated::Dark Gray is recommended for Work Truck (WT) models^^2014/GMC/Sierra 3500 HD/SLT Cr...