GYS Calibration
Diesel pickup truck in a GYS Calibration tuning workshop

Diesel performance lab

Precision Diesel Calibrations

Custom ECU and transmission tunes for Powerstroke, Cummins and Duramax — built for your truck, by real tuners.

Ford, Ram & GM diesels

Powerstroke, Cummins and Duramax

Private file delivery

Calibrations in your secure account

Direct tuner support

Revisions as your build changes

Ford Powerstroke

Ram Cummins

GM Duramax

Services

Built around your build

Core

Custom ECU Calibration

Hand-built engine calibrations written for your exact truck, modifications and goals.

Power

Engine Performance Tuning

Safe, measurable horsepower and torque gains with refined throttle response.

Drivetrain

Transmission Calibration

Firmer, smarter shifts and torque management matched to your engine tune.

Tow

Tow & Daily-Driving Calibration

Conservative, reliable tunes for heavy towing and everyday drivability.

Efficiency

Fuel-Economy Optimization

Efficiency-focused calibrations that stretch every gallon.

Data

Diagnostics & Data Logging

Datalog review and diagnostics to verify health and dial in performance.

Truck AI Advisor

Turn truck details into a tuner-ready assessment.

Start with a VIN, make, model, year, engine, mileage and symptoms. The advisor explains compatibility, diagnostic next steps and the information a human tuner needs.

Start an assessment

Vehicle identity decoded

Symptoms and DTCs organized

Safe next steps explained

Human tuner review prepared

How it works

Watch the request-to-road flow

STEP 01

STEP 01

Build your truck profile

Choose the vehicle and document its current hardware so every decision starts from the correct configuration.

STEP 02

STEP 02

Define the goal

Tell the calibration team exactly how the truck is used and what you want to improve.

STEP 03

STEP 03

Review and calibrate

The team reviews the intake, sends a quote, and builds the file after your approval.

STEP 04

STEP 04

Flash, log and refine

Load the file with your supported device, drive the truck, and share feedback for revisions when needed.

Explore the complete process

Tuner-reviewed files

Every calibration is reviewed for the vehicle, platform, modifications and approved goal.

Hardware guidance

Choose the right supported device, unlock path and delivery process for your truck.

Revision support

Share logs and drivability feedback inside your account for organized follow-up.

Ready to build the right tune?

Start a tune order