3.0L Duramax LZ0 Power Tuning Package | Chevy & GMC | 2023–2025
Type: Tuners
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This LZ0 tuning package supplies the interface, ECM calibration and licensing needed to program a compatible unlocked Silverado or Sierra 1500.
Vehicle fitment
- 2023–2025 Chevrolet Silverado 1500 and GMC Sierra 1500 with the 3.0L Duramax LZ0.
- Not compatible with LM2 engines; verify engine and ECM before ordering.
Specifications
| Specification | Details |
|---|---|
| Engine | 3.0L Duramax LZ0 |
| Tune options | Stock Optimized, Tow or Street |
| ECM credits | 6 included |
| ECM unlock | Required before programming; arrange separately unless expressly included |
| Optional TCM selection | Requires additional transmission licensing; not part of the standard 6 ECM credits |
What is included
- OBD2 flash tuning interface
- 6 ECM licensing credits
- Custom LZ0 ECM calibration
- LZ0 CAN BUS plug components
Before installation
- An ECM unlock must be completed before the custom calibration can be written.
- A compatible Windows laptop, HP Tuners software, stable internet and power supply are required.
- Follow the supplied read, unlock and programming instructions before any emissions-hardware changes.
For off-road or competition use only where permitted. Follow the supplied installation and tuning instructions.
Frequently asked questions
Can I use an LM2 calibration with this package?
No. LZ0 and LM2 engines require different ECM calibrations and unlock processes.
Is transmission tuning standard?
No. Choose the TCM option if required. Transmission licensing is separate from the six ECM credits in the standard package.
Does the ECM need to be unlocked first?
Yes. Arrange the correct unlock service before programming; the interface alone does not replace that requirement.
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While we ship with all required USMCA/CUSMA paperwork, U.S. Customs or carriers may still apply duties or fees at delivery. For details, see U.S. Customs & Border Protection
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Return Policies
Your satisfaction is important to us. If you wish to return an item or request a refund, please review the terms and conditions outlined in our Returns Policy.
Important Notices
- Off‑Road Use Only
Products sold by JS Speed are intended for off‑road use and may be illegal on public roads where emissions or pollution‑control laws apply. - Check Local Laws
Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area. - Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.
