Cummins HD Tuning and Connection Hardware

Explore custom Cummins HD tuning and the equipment for your setup. Choose a service, confirm your truck details, and send a request for compatibility review.

Start with a tuning request. We review your installed engine, ECM, setup, and chosen tuning method, then confirm your quote before payment.

Let's Get Started

Tuning Made Easy! Find the service and connection information for your heavy-duty Cummins truck. HDTruckTunes creates custom tuning files in-house and reviews each request by the installed engine, ECM, truck setup and chosen method.

Choose your tuning route

Cummins HD tuning through EZ LYNK: review tuning, existing AA3 hardware and LYNK choices.
Remote Cummins HD tuning: prepare a laptop, TeamViewer and a compatible J1939 connection for review.

Our service is for Cummins heavy-duty applications, including the confirmed CM870, CM871, CM875, CM2150, CM2250, CM2350 and CM2450 ECM families. Pickups and light-duty trucks are excluded. Check the compatibility page before assuming that a truck make, year or ECM family establishes support through a particular method.

Understand what each hardware item does

EZ LYNK Auto Agent 3: the device offered for a supported EZ LYNK setup.
AA3-only HD 9-pin adapter: the separate cable offered for Auto Agent 3 and a reviewed diagnostic connection.

Already own an AA3? Include that in your request so an extra device is not added. Device hardware, cables, tuning and any applicable LYNK fee are distinct parts of the quote. Hardware-only requests do not include tuning or a tuning-related LYNK fee.

Prepare a useful request

Read the request checklist, hardware, files and cables guide, or EZ LYNK and remote method comparison. Submit your known details and identify anything you cannot confirm.

The form saves your request for compatibility review. Your quote and payment steps are confirmed afterward. Hardware shipping to the US or Canada is quoted separately; UK hardware delivery needs confirmation. Digital tuning alone has no hardware shipping charge.

Let's Get Started

No items are currently listed in this collection. You can still submit a tuning request for review.

Need EZ LYNK hardware?

The hardware section includes the EZ LYNK Auto Agent 3 and an Auto Agent 3 HD cable with a 9-pin round connector. Confirm your diagnostic connector and setup before requesting hardware.

Hardware shipping is confirmed for the United States and Canada and quoted separately before payment. Auto Agent and cable requests are packed together when fulfilled from the same location. Tuning alone has no hardware shipping charge.

View hardware options