Overview
This kit is designed for 2017-2026 Chevrolet Silverado and GMC Sierra 2500HD and 3500HD trucks equipped with the 6.6L L5P Duramax engine. It combines a tuning interface, year-specific calibration options, your choice of exhaust setup, and an L5P EGR & Cooler Kit in one matched package. This kit is intended for off-road and competition use only.
Please Note: 2024-2026 L5P ECMs (E42) must be sent to HP Tuners to be unlocked before tuning. This unlock service is not included in the kit.
Vehicle Fitment
| Item | Information |
|---|---|
| Make | Chevrolet / GMC |
| Models | Silverado 2500HD / 3500HD and Sierra 2500HD / 3500HD |
| Engine | 6.6L L5P Duramax |
| Model Years | 2017-2026 |
ECM Compatibility
| Model Years | ECM | Unlock Requirements |
|---|---|---|
| 2017-2018 | E41 | Unlock Tool Upgrade included |
| 2019-2023 | E41 | Updated unlock process required |
| 2024-2026 | E42 | ECM must be sent to HP Tuners for unlock; not included |
ECM Compatibility Notes
- Confirm your truck's model year and ECM type before ordering.
- For 2024-2026 models with the E42 ECM, the ECM must be sent to HP Tuners to be unlocked before tuning. This unlock service is not included in the kit.
- Unlock requirements vary by model year and ECM configuration.
Tuning Options
| Model Years | Tuning Credits | Available Tuning |
|---|---|---|
| 2017-2023 | 4 credits | SOTF package with 0, 50, 75, 100, and 150 HP levels |
| 2024-2026 | 8 credits | Single calibration; SOTF is not available |
Tuning options depend on your truck's model year and ECM. The 2017-2023 package includes switch-on-the-fly (SOTF) tuning with selectable power levels. The 2024-2026 package uses a single calibration and does not support SOTF.
What's Included
- OBD2 flash interface
- Calibration package based on model year
- Unlock Tool Upgrade for applicable configurations
- CAN BUS plug kit for 2017-2023 models
- Choice of exhaust setup: L5P DPF race pipe, 4-inch Downpipe-Back Exhaust, or 5-inch Downpipe-Back Exhaust
- L5P EGR & Cooler Kit (components listed below)
L5P EGR & Cooler Kit Components
| Item | Quantity |
|---|---|
| Coolant hoses with pre-installed fittings | 3 |
| Aluminum plate | 1 |
| Steel plates | 2 |
| Grade 8.8 bolts | 4 |
| Vacuum cap | 1 |
| Hose clamps | 2 |
| Exhaust gaskets | 3 |
| Turbo gaskets | 3 |
| Aluminum 9th-injector plug | 1 |
| Aluminum coolant-hose plug | 1 |
Optional Upgrades
- TCM Tuning Upgrade Kit: Optional transmission tuning upgrade.
- GM Duramax L5P 3.5-inch Down-Pipe: Optional hardware upgrade. Verify fitment and applicable emissions requirements for your vehicle before ordering.
Frequently Asked Questions
Which trucks does this kit fit?
This kit fits 2017-2026 Chevrolet Silverado and GMC Sierra 2500HD and 3500HD trucks equipped with the 6.6L L5P Duramax engine. Confirm your model year and ECM configuration before ordering.
Is the ECM unlock included?
The Unlock Tool Upgrade is included for applicable configurations. For 2024-2026 models equipped with the E42 ECM, the ECM must be sent to HP Tuners to be unlocked before tuning; this unlock service is not included.
What is the difference between the E41 and E42 ECM?
The E41 ECM is used on 2017-2023 applications, while the E42 ECM applies to 2024-2026 applications. Unlock requirements and available tuning options vary between these configurations.
Is switch-on-the-fly tuning available for all model years?
No. The 2017-2023 package includes SOTF options with 0, 50, 75, 100, and 150 HP levels. The 2024-2026 package uses a single calibration and does not offer SOTF.
Which exhaust options are available?
You can choose an L5P DPF race pipe, a 4-inch Downpipe-Back Exhaust, or a 5-inch Downpipe-Back Exhaust.
Do I need to check anything before ordering?
Yes. Confirm your truck's model year, ECM type, and unlock requirements. Check that any optional hardware is compatible with your vehicle and complies with applicable emissions regulations.
Additional Information
- Confirm model-year and ECM compatibility before purchase.
- Unlock requirements and tuning availability vary by vehicle configuration.
- Optional upgrades are separate from the included components unless otherwise specified.
- For off-road and competition use only. This kit may not be legal for use on public roads where vehicle pollution-control laws apply.
Shipping
Free shipping on tuners. We aim to dispatch in-stock orders within 2 business days. Most North American orders arrive within 2–7 business days after dispatch via expedited ground. International orders typically take 5–14 business days, depending on destination and customs.
Transit time starts when your order ships, not when you place it. Weekend orders are processed the next business day. Orders shipping outside Canada may be subject to import duties and taxes, which are the customer’s responsibility on delivery. See our shipping policy for full details.
Items Eligible for Return
These items can be returned within 30 days of the purchase date if they are unopened, unused, and in their original packaging:
- Tuning devices: an unopened, unused Mini Maxx V1/V2 or a blank EFI Live device.
- Cables and device accessories: an unopened, unused switch, bypass cable, universal pyrometer, or docking station.
Final Sale
The following items are final sale and cannot be returned:
- Custom tuning: additional tune files purchased separately, and custom tuning purchased with a device.
- Exhausts and race pipes: including downpipes purchased separately from an exhaust or race pipe.
- EGR kits.
Manufacturer Warranty
Every item we sell includes a 90-day manufacturer warranty. An item returned for a manufacturer defect can be refunded in full, exchanged, or replaced with a similar item of equal or lesser value.
Eligible items returned for any other reason follow the same options — a full refund, an exchange, or a replacement of equal or lesser value — as long as the item meets the requirements above.
Return Process
Every return must be approved before it is sent back. Email support@dynamicdiesels.com or call 1-877-600-5667 and we’ll issue a valid Return Merchandise Authorization (RMA) number and a prepaid return label.
Do not send anything back without an approved RMA and the return label we provide. Returns sent without both will not be accepted or processed. See our refund policy for full details.
Warranty
All tuning devices come with a 90-day manufacturer’s warranty from the date of delivery. You have a full 90 days from delivery to start a warranty claim if an issue arises. We also honor all applicable manufacturer warranties on the products we sell; coverage period and claim process vary by brand and product category.
To start a claim, email support@dynamicdiesels.com or call 1-877-600-5667 with your order number. We may ask a few questions about the device to confirm the fault, and we may request proof of communication with the manufacturer, as they are often the primary contact for device issues.
Once your claim is approved, you can choose one of the following:
- Return for replacement: Send us the faulty device, and once we receive it we’ll dispatch a replacement of the same or a similar device of equal or lesser value.
- Return for refund: Return the faulty device and we’ll refund the original payment method. Please allow 3–4 business days for the refund to appear.
- Return for gift card: Receive a gift card for the faulty device, sent to the email on file and available to use right away.
You’ll receive a Return Merchandise Authorization (RMA) number and a prepaid return label to send the faulty device back. See our refund policy for full details.
Related products
You may also like
EZ Lynk 6.6L Duramax L5P Delete Kit | Complete DPF/DEF/EGR Delete | GM 2018-2023
GM Duramax EZ LYNK LML/L5P/LM2 Tune Package
Fits 2011–2023
GM Duramax L5P HP Tuner MPVI Tune Files - SOTF and Single calibration
Fits 2017–2026