2017-2023 L5P Duramax EzLynk Upgrade Limited to Unlimited Support

All ECM calibrations are delt with on a first come first serve basis. Most requests will be completed within 24-72 hours. Revisions should be requested through email and will be accommodated accordingly to the request. WRONG DEVICE OR VEHICLE INFOMATION PROVIDED AFTER THE TUNE IS WRITTEN WILL RESULT IN A FEE TO REVISE*

Peakside Performance is not responsible for damage resulting from any modification performed by, produced by or recommended by us. Buyer assumes all risk for modifications and is responsible for any mechanical failures resulting from these modifications. Completely stock vehicles break every day for no reason.