The Auto Meter 17120 Dual Pillar Pod for your 2015 GM 6.6L Duramax LML is specially designed for a custom fit to your trucks interior. Designed to hold (2) 2-1/16" gauges this pillar pod gives you the ability easily view and monitor your parameters with gauges of your choice. FEATURES: Dual Pillar Fits (2) 2-1/16" Gauges