Bully Dog A-pillar Mount No Speaker GT PMT and WatchDog GM Silverado and Sierra 1500-3500 07.5-11The custom a pillar mounting system is the cleanest install for the PMT. Installation is very simple, these custom a pillar mounts simply slide over the top of the stock a pillar. Some a pillars come to match vehicle interior colors, but all of the custom a pillars can be painted to match any vehicle interior color. This pillar also has holes for the stock pillar speaker. This Part Fits: Year Make Model Submodel 2009 2013 Chevrolet Silverado 1500