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Grizzli Diesel Performance
- Automotive
- Carol Stream, IL
About this business
Location details
25w658 St Charles Rd unit 3, Carol Stream, IL, 60188, United States
Get directions| Weekday | Schedule | Status |
|---|---|---|
| Mon | 9:00 a.m. to 5:00 p.m. | |
| Tue | 9:00 a.m. to 5:00 p.m. | |
| Wed | 9:00 a.m. to 5:00 p.m. | |
| Thu | 9:00 a.m. to 5:00 p.m. | |
| Fri | 9:00 a.m. to 4:00 p.m. | |
| Sat | Closed | |
| Sun | Closed |
Needed a diesel mechanic close by and found Grizzli Diesel. The owner John is a super nice guy and very knowledgeable. As soon as you walk in you know they mean business. John’s been going through a truck I recently bought and working out all the kinks and has delivered a really reliable truck to me. He always answers his phone, answers questions, and is there to help you out. Very few mechanics care as much as he does. He is my new go to diesel mechanic and will be the only hands that work on my truck. Highly recommend!
I took my 21 Denali L5P to the crew at GDP and they did an awesome job “upgrading” it with a trans tune and SOTF tunes. It been 27k miles now since the work was completed. I’m happy to report that everything is working flawlessly. Thank you so much for great work. I’m also getting some awesome fuel mileage as a result. Edit: 1/15/2026 I started having a misfire from cylinder 3. It was quickly diagnosed as a fuel injector going bad. He replaced it with a new GM part and a new pig tail. My new mileage is over 453k miles and it... read more
Brought my bmw here For brake pads and rotors. Parts took no time at all to receive& service was done quickly! Very reliable and reasonably priced! Thank you ! Will be returning.
The owner John , is very knowledgeable and has a super clean and organized shop. I am 110% satisfied with the work and performance upgrade done on my '07 duramax. 10/10 highly recommend.
I had a lot of questions with the modifications I had in mind for my truck,john was very helpful and just as excited as I was. I even added a few things along the way which all worked together well. I couldn't be happier with the outcome,performance and attention to detail.highly recommended.now open a shop up north lol
Frequently asked questions about Grizzli Diesel Performance
How is Grizzli Diesel Performance rated?
Grizzli Diesel Performance has a 4.6 star rating with 65 reviews.
When is Grizzli Diesel Performance open?
Grizzli Diesel Performance is closed now. It will open at 9:00 a.m.
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