*Do Not Purchase if you have purchased, or plan on purchasing an Underground Tune. Our tune comes with free PCM Unlocking*

Our one-time, send-in upgrade option will upgrade your original or spare PCM to enable tuning. Simply send us your PCM and we’ll send it back to you fully upgraded for tuning in the latest VCM Suite (BETA).

Make sure to include the make and model of your vehicle, the stock file, and your VIN when checking out (always double-check your VIN for accuracy to avoid delays). This service takes 1-3 business days to complete (not including shipping times).

Important Note: This is a send-in service that requires you to send Underground Tuning your original/spare PCM for servicing.

Please note this service is required to tune your 2015+ Dodge/Chrysler/Jeep/RAM (all FCA models, except the 2015+ Dodge Viper and 2014 to 2019 Jeep/Dodge/Ram vehicles with the EDC17C79 PCM).

Please allow 1 to 3 business days from once we receive your stock calibration file to process your order and apply your file to the new PCM.

Shipping address for send-in services: (You are responsible for shipping to our facility)

Underground Tuning
[Insert Your Order Number Here]
11623 Fairgrove Industrial Blvd
Maryland Heights, MO 63043

*Do Not Purchase if you have purchased, or plan on purchasing an Underground Tune. Our tune comes with a Smart Access Cable*

Ready to tune your 2018+ Dodge vehicle? The Dodge Smart Access cable enables read, write, and special functions for tuning and diagnostics.

*Do Not Purchase if you have purchased, or plan on purchasing an Underground Tune. Our tune comes with an Underground Tuning Device*

Tune your 2011-2023 Mopar & C8 Corvette with the Underground Tuning Device. You will have the ability to switch tunes, data log, & check codes from the TDN Mobile App! It is controlled via Bluetooth right from your phone!