2011+ Duramax LML's unfortunately can't shift on the fly with H&S tuners. If you want to change the power level, then you will need to go through another Install Download process.
Can the GMC/Chevy Duramax tune levels be shifted on the fly? Print
Modified on: Mon, 11 May, 2020 at 11:26 PM
Did you find it helpful? Yes No
Send feedbackSorry we couldn't be helpful. Help us improve this article with your feedback.