Stealth Module - Chevy/GMC Duramax L5P 6.6L (2017-2018)
56 (4.9 out of 5.0)
Financing options available
Make your diesel have more efficient power and fun to drive with our Chevy/GMC Duramax L5P 6.6L Diesel Performance Module exclusively for Chevy/GMC Duramax L5P 6.6L years 2017-2018. Your module will be a stand-alone computer that simply plugs in under the hood of your truck. It will not increase fuel volume, so there’s no need for any other modifications. Make your truck work smarter, not harder! Get that extra boost in performance without any harmful side effects.
- Chevrolet/GMC years: 2017, 2018 L5P
- Chevrolet/GMC diesel models: 2500, 3500
The Chevy/GMC Duramax L5P 6.6L Diesel Performance Module provides:
- Better throttle response
- Decreases turbo lag
- An increase in low to midrange power where you need it
- Unleash—Increased hp, 120 ft-lbs of torque*
- Reliable torque increase
- Safe for towing and everyday driving
- Stays within stock safety parameters
- Stealthy technology does not leave a footprint in the ECM
- Potential fuel economy gains. Most customers see a 10-20% increase with proper driving habits.
- Smooth and predictable power across the entire RPM prevents the transmission from struggling to find power and hold gears
- Includes all weather factory style OEM plug and play connectors for quick and easy installation
How it Works:
The module is a stand-alone computer that plugs in under the hood. The internal software meticulously works to optimize the injection pressure to amplify combustion efficiency.
By bringing the fuel rail pressure to its desired pressure sooner, it allows for finer fuel atomization. In turn, elevating fuel-air mixture. This allows for better combustion quality, efficiency, and power output. The end result is more torque where you need it, less turbo lag across the whole RPM spectrum, and increased throttle response. Keep in mind, your truck’s stock safety parameters remain in place. The module is a safe solution for every day driving and hauling.
The selectable module includes a switch with 4 modes:
Stock, Low, Medium, and High
- Approx. 5 minute installation time
- Installation Instructions
- Shipping & Warranty
Standard shipping takes 5 - 7 business days.
Expedited shipping takes 1 business day.
Note: Any orders made after 12:00pm EST may be processed the next day.
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- Turbo lag
For 2017 GMC Duramax...Easy install. Easy removal for service. Conservatively 3-4 mpg better (not currently towing). Way less turbo lag. Very satisfied!!!
Definitely helped turbo lag on my 2019 Chevy 3500
Great experience, simple install and easy to read instructions. Highly recommend this product,one buddy has already ordered his. Big notice in power and driving 75 to 80 mph down interstate with empty truck 16.2 average fuel mileage. Very satisfied customer. Thanks again
I have an 18 Duramax and have had several issues with the truck going into limp mode. Not sure if it is a module issue or if the truck has issues but the customer service is amazing. While having technical issues calling the 888 number the owner took his personal time at midnight to call me and assist me in trying to fix an issue that very well may have nothing to do with the module and is continuing to help me get my truck running like it should! Best customer service I have seen in a long time!
Great things come to Pass.
Took 30 minutes to install, just cant believe the additional power and the increase in fuel mileage, Pre-ordered back in November 2017, glad I waited for it. Their Customer service is the best, always got updates on the progress of the Module upto and including the day it shipped. I recommended it to my Nephew , he just bought a 2018 D-Max. last week
Easy process and fast delivery
2018 Silverado 3500 CCLB, 4.5" BDS Lift, 295/65R20 Nitto Trail Grapplers
Love the turner!!! Bought after reading reviews and waiting for full delete to get through beta testing. Put on 6100 miles since I bought it and seen an average of 2.9 MPG increase! Running 78 mph I can avg 17.8 and around 14.7 mpg when running 85-90 mph. Would Highly recommend for anyone looking to wake up the L5P and get rid of the dead pedal.
First time in cold and snow, ran like a beast!
Eric Madrid is a very good dude, helped me through some quirks, always polite! And he answers his phone or gets back with a text.
Shocking sigh of relief (long, semi detailed review)
As you will hear from multiple reviews, we are all skeptical, took me 4 months to finally risk the money on this module. I immediately rushed out to install it when the ups man dropped it off. Since then, I have noticed that my MPG has risen, dead pedal is all but non-existent, and turbo lag has significantly diminished. Day to day driving is up about 34 mpg and Trailering has come up about 2-3mpg which shocked me the most. Also, love the length of the switch cable. Gives you options on where to mount other than just your common, under the steering wheel location. I mounted mine in the upper glove box, out of the way of accidental bumps from the legs. looking at levels(S,1,2,3) I have not tried the level 3 setting as I am not one to push my trucks limits until needed, I love it set on level 2 from day of install and reduce to level 1 when wife wants to drive haha. SUMMARY= Great Investment if you're not modding your truck but, just wanting cleaner response and drivability. I will definitely send my friends and family to order their stealth modules or I might give one away as a birthday gift. I will add a review after lifting my truck to see how it sits from there with more load
Fuel mileage was a instant increase by 2mpg around town and the power difference is unbelievable. Cant wait to hook it to the trailer this spring to go pulling
Great power increase and a 3 MPG increase In My 2018 Duramax.
The midrange HP increase is very noticeable and the 3 MPG fuel savings is an added bonus.
2017 High Country Duramax equipped with a Stealth Module
Stealth Module in my 2017 Duramax has improved performance and fuel mileage.
Just installed this on my 2018 duramax yesterday. I can tell you so far this product delivers as advertised. Looking forward to see what kind of mpg gains i get out of it as well. Nice add on for trucks still under warranty to get the most out of them. I definitely reccomend.
2018 Chevy Duramax Diesel
Once I installed the Stealth Module and took the truck for a test drive I was blown away with the response! I highly recommend Stealth! I keep it on the 60hp setting but did do some hotrodding with the 90hp setting. I've seen a little bit better fuel economy overall but it does depend on my driving habits.
I had 08 Duramax I had it lab tuned and straight piped and it was a going machine when I bought my 2018 Duramax I was super disappointed in the power compared to to my 08 off the line and the horrible turbo lag that the 2018 have. Thanks to the stealth i now love the new truck. No more turbo lag and off the line it gets up and screams. It pulls my trailer awesome and it increased the fuel mileage. Install was easy. My only suggestion for improvements would be that the Instructions on the settings were less confusing and they better explain them or but letters on the dial, but i called and they helped me out know problem. Great customer service. Thanks Stealth for a great product!
I am very impressed with the performance and the ease of installation.
Heading from Ohio to California with the stealth power and mpg gains
My experience has been awesome. Hauling my 13500 pound camper I gained 1 mpg not hauling I've gained an average of 2.5-3 mpg
Very easy install (2mins) Smooth throttle response and less lag Very noticeable power increase Roughly 3mpg increase at 75mph (21mpg)
Stealth performance upgrade
Definitely improved fuel mileage on long highway drives and a lot better throttle response. Easy installation. Would like a better control knob but all in all this is a good purchase.
2019 Silverado 2500 HD Duramax
Ordering experience was great! Highly recommend. Easy Installation and immediate gains. Not so much of dead petal anymore and seen improvements on mpg's. Towed my trailer like a champ and can feel the torque. This by far is the funnest truck I have ever had. Thank you Stealth Performance! Hopefully you come out with more products for L5P's!!!