DU-HA CHEVROLET & GMC LOCK KIT - Fits 99-07 Chevrolet/GMC Extended Cab Silverado/Sierra (Classic) Pickup Trucks - Now that you have a place to put all your stuff, you can lock it up! The DU-HA Lock Kit locks the back seat bracket so unwanted visitors cannot lift up the seats and gain access to the gear stored in your DU-HA. Covered solid body padlock features a 1-9/16 in. (40mm) wide black vinyl covered body for scratch and corrosion resistance. The 1/4 in. (6mm) diameter shackle is 13/16 in. (21mm) long and made of hardened steel, offering extra resistance to cutting and sawing. The 4-pin cylinder helps prevent picking and the dual locking levers provide resistance against prying and hammering.Note: This lock kit will only work with 1999-2007 Chevrolet and GMC Extended Cabs "Classic Body Style" models. This lock kit will NOT work on 2007 and newer "New Body Style" models. Some drilling required to install.