Contreras Diesel Center, Inc. 670 Vandustrial Drive, Westmont, IL 60559

"Contreas worked on my class a rv suspension and did a wonderful job. quality work and got it done fast.. Great job guys!!"

"Called them for coolant leak and oil change on a box truck, dropped off the truck and when I stopped by to pick it up, they over charged me, (semi truck price) and they said they couldn't find the leak and only added some coolant, when I asked why is it so expensive they lied to me that Cummins ISB 6.7 takes 9 gallons of oil when owners manual says 12 quarts (just over 3 gallons) than they said: "I should ask for the price before I scheduled repairs" btw leak was obvious end evident they removed one small pipe/fitting and reapplied the thread sealer on the EGR cooler, (in different shop of course) stay away from this shop, I'll certainly never visit them again."

"The owner of this shop Paco is a great guy! If other shops back off he is the one you bring it to to get your truck fixed! He can literally do everything and anything. I’ve witnessed it weekly for over a year he’s been the main shop servicing my fleet! 100% recommend!"

"Bought a truck that was swapped by them. Needed a help with getting a code fixed and took care of me to get it done. I would take and older reviews with a grain of salt, these guys seem to know what they're talking about and have ironed out the kinks in the process. Would recommend."

"These guys are the absolute best! We were quoted $6000 by another mechanic on a repair for our Mercedes’ sprinter. The mechanics are super kind and found another solution for us that only cost us $900. They were welcoming, and found a way to work within our budget. We’ve now covered over 2500 miles and our van is still running great! Can’t recommend them enough, especially if you have trouble with your sprinter!"