Custom EFI Live Tune L5P Duramax 2017-2023

We offer multiple options for delivering your custom tune to ensure the most convenient and efficient experience for you:

1. Email Delivery (EFI Live AutoCal or FlashScan Owners): If you already possess an EFI Live AutoCal or FlashScan, we can email the custom tune file directly to you. Please note that you will need to have your AutoCal unlinked from any previous tuner. We are available to assist you in this process. Read Notice Below.
   

2. Pre-loaded AutoCal Purchase: If you do not have an AutoCal or FlashScan, you can acquire one through us, and we will pre-load your custom tunes onto the device. This option minimizes truck downtime and simplifies the process. Read Notice Below.
   

3. Bench Flashing Service: You may opt for our bench flashing service, where you send us your ECM for tuning. This is a cost-effective alternative to purchasing your own hardware. We offer same-day turnaround times for this service to reduce truck downtime. After placing your order, you will receive an email with shipping instructions. This does include the cost to unlock the ECU.
   

Regardless of the method you choose, all our sales include comprehensive remote support and unlimited free updates, unless you decide to upgrade to non-VGT, twins/compound setups, or injectors with a 30% increase in size.

Important Notice: Please be advised that flashing our tunes onto an E41ECU, as found in the L5P, requires the ECU to be unlocked. It's crucial to note that EFI Live-based tunes cannot be flashed onto a truck that has been unlocked using another unlocking processes. ECU unlocking must be performed by us or another party utilizing the Avto platform. Failure to adhere to this requirement will result in the forfeiture of any refund. Thank you for your attention to this matter.

Please be aware that AutoCals may experience high demand, and shipping may take 3-5 days.