This is Lock'er Down's EXxtreme model is just like the standard 12 gauge safe except they skeletonize the door and then weld a 10 gauge plate on top to strengthen it and cover the front and side gaps to resist prying. This safe fits the new design 2014 - 2018 Sierra and Silverado with the split bench seat. One big change this year, is that the SLT and LTZ models no longer come standard with bucket seats and consoles. Standard is the Leather Split Bench Seat. This unit is for the split bench model and fits in the compartment under the center section. It will not fit the 2014 HD trucks (2500 - 3500) Use the LD2014. This model is comes standard with 4-dial lock. For other lock options call DSI.