Find the Tuning Switches you need for the performance tuning in your 2004.5-2005 Chevy/GMC 6.6L LLY Duramax. Change the switch-on-the-fly programming on your vehicle with the switches available. High-idle kits work well with remote starters, PTO's and extended idling applications. Industry-leading manufacturers like Duramax Tuner, Longhorn Fab Shop, and BD-Power are available.
