best tuner i have had tune my truck. very knowledgeable about what he’s doing and very helpful with helping me understand a tuning issue from other tuners

I recently had the pleasure of getting my car tuned by Derek, and I couldn’t be happier with the experience. From start to finish, Derek provided excellent service that was both professional and thorough. He took the time to explain every step of the tuning process, ensuring I understood what was being done and why.

Now that my car is tuned, I’m all set to hit the track! I’m excited to gather data and send it back to Derek for further analysis. I truly appreciate his expertise and dedication, and I look forward to working with him more in the future to enhance my car’s performance. Highly recommend his services to anyone looking for a top-notch tuning experience!

Wow!!!! Is all I can say abt Derek he tuned my car in just minutes where I’ve been to numerous of other tuners who kept my car for days and still ruined tune.. Derek broke everything down to me and explained each step he went through to tune my car and now I can’t stay out of it I’m a very satisfied customer and will be back some with my next project he is my guy from now on #TheBESTTUNERAROUND

Derek is by far one of the best tuners out there! He always makes an effort to explain & NOT sound condescending or rude.
By my 3rd file in HPT I realized he was legit as nearly all my previous issues were gone. I've offered plenty of times to pay for additional changes and he respectfully declined. I've driven over 10k miles on his tuning and the truck continues to perform amazing!
Here's a pic of my 16 Sierra Whipple, LT4 fuel, 10L80 swap.

2/1/26 Update. Changed my setup to built motor & 15psi.This came ONLY because shit E85 killed my injectors and I thought the engine was hurt(it wasn't). Derek once again delivered top notch service and answered all my questions and addressed all my concerns. The truck is an absolute sleeper animal! Spins all 4 tires off the line pedaling it!!

Derek got my car dialed in, running smooth and making great power on low boost and low timing. Cannot wait to add fuel, raise boost and wick it up! Derek provides awesome customer service along with an awesome end result!

Derek did amazing on my 6.2 lt1. Hands downs someone I can put my trust into from here on out. A1 communication and honesty. He even tuned my ss on his birthday.. that alone should tell you what type of guy he is.

First, Derek got back to my emails super speedy. Got me in for a tune as soon as possible, and got it right.
Any questions I asked, he answered, and took the time to explain things. My truck feels more enjoyable and smooth. Just plain SMOOTH. the shifts are quick with no jerks, the throttle response is instant, the truck is way happier and so am I.
Once finished, he made sure to ask if anything else needed changed or any shift points adjusted.. very professional and respectable!
I’ll recommend DDTech to anyone thinking about getting a tune

Derek was amazing tuning my G8 and walking me through all the steps needed. Answered all my questions and emails even on Sunday's. Great pricing and fast response!!! Thank you

I had my truck remotely tuned but Derek. The problem with tuners today its hard to find good trustworthy ones. He's the 3rd tuner ive had because the other 2 just never got the truck right and seemed like they didnt want to take the time to fix it. They were to worried about other things. Derek nailed the tune and restored some faith haha. We went back and forth for hours with data logs and tune files until the truck was perfect. He is a must use tune for sure and I will be telling everyone I know to use him.

DDTech Tuning did an excellent job on my tune. Communication was clear and professional the entire process, and the revisions were quick and dialed in. The car pulls strong, shifts smoothly, and feels extremely refined—exactly what I was looking for. Data logs were reviewed thoroughly, and you can tell Derek really knows what he’s doing. Couldn’t be happier with the results and would absolutely recommend DDTech Tuning to anyone looking for a quality, reliable tune.