Stealth Module - Chevy/GMC Duramax L5P 6.6L (2019-2023)

Take your power back with the Stealth Module exclusively for (2019-2023) Chevy/GMC Duramax L5P diesel trucks. This module is a stand-alone computer that is placed under the hood of your vehicle with no additional supporting modifications or monitoring necessary. Get the most out of your vehicle's performance while remaining warranty friendly.

Works With:

• Chevrolet/GMC years: 2019, 2020, 2021, 2022, 2023 L5P/L5D
• Chevy/GMC diesel models: 2500, 3500, 4500 chassis, 5500 chassis
• Transmission: Automatic, Manual

Stealth offers a cost-effective approach to taking back your power and maximizing your truck's performance. You no longer have to sacrifice anything in the search for upgrading performance! No need for endless modifications or flashes to your truck's ECM. The Stealth Module is the easiest, no hassle approach to give your diesel a safe improvement of power and performance. Backed by a 1 Year Warranty your purchase includes 24/7 technical support and superior customer service. Finally the high-quality, safe, and non-invasive performance solution your truck has been waiting for.

Keep in mind, your vehicle's factory safety parameters remain in place. The Stealth Module is a safe and upgraded solution for everyday driving and towing tasks. See why thousands of diesel pickup owners and enthusiasts are turning to Stealth.

 

The Stealth Module is a stand-alone computer that plugs in under the hood. Our internal software meticulously works to optimize the factory injection pressure to amplify combustion efficiency. By bringing the fuel rail pressure to its desired pressure sooner it allows for finer fuel atomization and a more complete fuel burn. In turn, the engine receives better combustion quality, efficiency, and power output. The end result is more torque when and where you need it, improved overall drivability performance and vehicle responsiveness.

Keep in mind, your diesel truck’s factory safety measures stay in place. The module is a safe solution for everyday driving and towing.

• Improved overall drivability, vehicle responsiveness and performance
• Increase in low to midrange power -where you need it (Better take-off and efficiency through the bottom end gears)
• Smooth and predictable power across the low-mid RPM ranges prevent the transmission from struggling to find power and hold gears longer
• Safe for towing and everyday driving while improving performance
• Increased horsepower and reliable torque
• All-weather factory style OEM plug and play connectors for quick and easy installation
• Engine operates safely within manufacturer parameters
• Factory safety measures/fail safes stay in place
• Warranty friendly: must be removed before service
• No external OBD II monitors or supplemental devices required
• Selectable 4 position switch: Stock, Low, Medium, and High

Yes! This is different from your traditional flash tuner. The Stealth Module does not reprogram or flash your ECM. In fact, we are working strictly within the manufacturers safety parameters. This means that anything the Module is asking the truck to do it is fully capable of doing already. If you remove the Stealth Module the truck would be 100% back to stock.

No other modifications, splicing of wiring, program download requirements or gages are needed. Just plug the Stealth Module in and you get safe, reliable power.

You can find the installation instructions here.

Mileage is impossible to guarantee with any modifications. The majority of Stealth equipped vehicles have reported mpg increases due to using the low-end power the module provides to keep their RPMs down and hold higher gears. With responsible driving habits it's not uncommon to see a nice bump in MPG along with an all-around better driving experience. 

Please purchase for drivability benefits and consider mileage as a potential bonus.

Check out our FAQ section on the website to learn helpful tips to maximize your vehicle's fuel efficiency.

Stealth Module - Shipping

Domestic:

Standard Shipping: 5-7 business days*
3 Day Shipping: 3 business days*
Expedited Shipping: 1 business day*
*Please note orders shipping to Alaska and Hawaii may experience longer wait times.

ATTENTION: Any orders made after 12:00pm EST will be processed the next business day. 

Saturdays, Sundays, and Federal Holidays are NOT considered business days.
Example: If you place an order on a Friday before 12:00pm EST and select expedited shipping, it will ship out Friday and arrive Monday. If you place an order on a Friday AFTER 12:00pm EST and select expedited shipping, it will not ship until Monday and will arrive Tuesday.

We do NOT ship or sell to California, sorry!