DETAILSI have a Stealth Performance tuner with the switch for sale for LML Duramax. I ran the tuner and it was great, no issues what so ever. Bought for $600, used it for 1500 miles with no issues or gripes about it. It takes about 5 minutes to hook it up, its very easy to use. Copied and pasted from their website: The Chevy/GMC Duramax 6.6L Stealth Performance Module provides: Better throttle responseDecreases turbo lagAn increase in low to midrange power where you need itIncreased hp, 120 ft-lbs of torque*Reliable torque increaseSafe for towing and everyday drivingImproves towing performanceStays within stock safety parametersStealthy technology does not leave a footprint in the ECMSmooth and predictable power across the entire RPM prevents the transmission from struggling to find power and hold gearsIncludes all weather factory style OEM plug and play connectors for quick and easy installation. Text me at 7073720297.