DIESELR GM Duramax L5P All In One Kit (2024-2026)

DIESELR GM Duramax L5P All In One Kit (2024-2026)

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$4,560.90
$4,560.90
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The 2024–2026 L5P All-In-One Kit Dieselr is the most complete tuning package available for GM’s latest 6.6L Duramax trucks equipped with the new E42 ECM. Built by techs, tested on real trucks, and packaged for results — this kit gives you everything you need to tune your L5P the right way.

Optional Upgrade — Transmission Tuning Support

This All-In-One Kit supports engine tuning out of the box. You can now complete the system by adding TCM tuning, which integrates cleanly and allows engine and transmission calibration to work together as intended.

To add TCM tuning, the following components are required:

  • GM T93 TCM Upgrade Service (Required - factory TCM send-in)
  • Dieselr T93 TCM Tune Files
  • (4) HP Tuners Universal Credits (sold separately)

This upgrade is optional, but recommended for customers who want full control and consistency across both engine and transmission tuning.

At the core is the HP Tuners RTD-4 paired with one of Dieselr’s custom Upto +180HP single-level tune files — VIN-matched, dyno-tested, and built for safe torque, better throttle response, and reliable power under load. No inflated claims. No guesswork. Just real results.

To use this kit, your ECM must be unlocked via the HP Tuners GM E42 ECM Upgrade Service. This mail-in service is required to make your factory ECM tune-ready.

 About the Required ECM Unlock:

The E42 ECM Upgrade Service is the first step in tuning your 2024–2026 Silverado or Sierra HD. Once your order is placed, you'll receive full shipping instructions to send your original ECM to HP Tuners. After unlock, it’s returned fully licensed and ready for RTD-4  use.

Only the original ECM is accepted — no spares allowed.
 Requires 8 HP Tuners credits and VCM Suite (Beta).
 Return shipping is included.

At Dieselr, we've already tested this unlock on our own fleet of 2024+ L5Ps — so you're not buying blind. You're buying what we run.

✅ What’s Included in the 2024–2026 L5P All-In-One Kit Dieselr:

  • HP Tuners GM Duramax - E42 Global B Unlock & Upgrade Service
  • HP Tuners RTD-4 
  • A Single Dieselr custom tune file [Choose from 5 levels with upto +180HP Gain]
  • 8 HP Tuners credits
  • 4” or 5” downpipe-back exhaust  or the Cat & DPF Straight race pipe
  • Dieselr EGR upgrade kit
  • Dieselr 3.5" downpipe

Important Notes:

  • No SOTF available — single-level tune only
  • CAN bus plugs not yet available — Can Bus Systems - NOx & DEF must remain plugged or tied in place. Functionality is unaffected
  • 4–5 day pre-sale processing window

Order your 2024–2026 L5P All-In-One Kit Dieselr now — and get tuned by the team building the future of L5P tuning.

 

DIESELR GM Duramax L5P All In One Kit (2024-2026)

$4,560.90

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Does it come with a warranty?

Yes, most products we sell are backed by the manufacture's warranty. Warranty coverage varies by brand, so check the product listing or contact us if you have any questions before purchasing.

What happens if I don't like it?

If you're not completely satisfied, we're here to help. Eligible unused items may be returned within 30 days of delivery, subject to our return policy and applicable restocking fees.

How fast is shipping?

We process most orders within 1-2 business days. Shipping times vary by product availability and location, but most customers receive their orders within 3-7 business days after they ship.

What's the returns policy?

Returns must be requested within 30 days of purchase, Items must be new, unused, and in their original packaging. Approved returns are subject to a 30% restocking fee. Custom order, electrical, and special order items may not be eligible for return.

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