Return to (2017-2020 L5P) Duramax 6.6L PRO Performance Module
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1 of 5 GMC Denali 2500 January 15, 2020
Reviewer: Travis Councilman from Jamestown , ND United States  
Module did not work as advertised. Every time I installed the module my pickup threw a bunch of codes and reduced power. Trying to return the module to get my money back has been a nightmare!! Can’t get ahold of anyone when I call, they never return my phone calls. I have emailed the company and they only got back to me once or twice but didn’t bother to help me or call me so I can return the module. Very unhappy and unsatisfied with this product and company. Very poor customer service!!!

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1 of 5 2018 GMC Sierra 2500HD December 20, 2019
Reviewer: Arthur Barlow  
Worst experience ever!  I purchased and paid for my performance module promptly.  I also received my module very quickly.  After examining the module, I decided not to install the module and return the module for the expressed refund.  I Attempted to call Steve to request an RMA number on 7 Nov 19 but the phone went to voice mail, so I left a message.  Steve text me back to ask my I wanted to return the module.  Through the exchange of text ( have never been able to get him to take a call) I received a RMA on Nov 10, 2019.  I returned to the module and it was delivered on Nov 16 2019.  More exchange of text: on Dec 5, 2019 Steve replied "I found your module and will refund asap."  Today is Dec 20, 2019 and I still haven't received my refund.  I dislike leaving bad reviews but I haven't had a good experience with this company and wouldn't recommend ordering from this company.  I'm just glad I didn't install their product on my vehicle. Still unresolved as of 12/20/19.

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5 of 5 2019 2500 HD Duramax July 19, 2019
Reviewer: Marvin Sumrall from Oak Grove , LA United States  
I was totally amazed with the increase of fuel mileage. He power increased as well. I would and have recommended this product to my friends.

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5 of 5 2019 Silverado 2500 hd June 1, 2019
Reviewer: Alan Gibson from Nampa, ID United States  
Getting mid to upper 20s mpg empty.

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5 of 5 2018 Silverado 3500 HD Duramax 6.6L May 9, 2019
Reviewer: Tim Rogers from Festus , MO United States  
Love it is everything I was told it would be 15%fuel milage increase . Nice boost in power

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4 of 5 2017 duramaz March 29, 2019
Reviewer: wendell singleton from chatom, AL United States  
when the module is working right it is great but about once a week it will drop my milage down to 12 miles per gallon for about 20 or 25 mile this last time it did your people told me to unplug it for 15 minutes and reboot it and I did but only have about 200 miles on it now and it has performed like it should but if it cuts me back to 12 miles to gallon one more time you will be getting it back.

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5 of 5 2018 Chev HD 2500 March 13, 2019
Reviewer: William H Gahagan from Sarasota, FL United States  
Super easy install. I was averaging 9-10 mpg around town and jumped to 14-15.
Definitely runs less restricted!!
Would buy it again!

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5 of 5 2017 GMC Denali February 17, 2019
Reviewer: Terence Carroll from Stevensville , MD United States  
module works great, more power and better fuel economy. highly recommend !!

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5 of 5 2018 November 9, 2018
Reviewer: Robert Jorgensen from Valrico, FL United States  
2500HD

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5 of 5 November 1, 2018
Reviewer: Noel Wellborn from Johnstown, CO United States  


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