Semi Truck & Trailer Repair in Melrose Park, IL
Your trucks don't stop — and neither do we. KNI Truck Repair serves owner-operators and commercial fleets with fast, reliable diesel repair and 24/7 mobile roadside service.
Heavy-Duty Truck & Trailer Repair Services
From routine maintenance to emergency repairs, we handle semi trucks and trailers with precision. Mobile service available across Chicago.
Engine & Drivetrain Repair
Full diagnostics, rebuilds, and repairs for diesel engines, transmissions, and driveline components across all major makes.
Brake Repair
Air brake and hydraulic brake service — pads, drums, rotors, lines, and complete system inspections to keep you safe and compliant.
Trailer Repair
Axle repair, landing gear, couplers, structural work, and lighting for all semi trailer types at our Melrose Park facility.
24/7 Mobile Roadside Service
Broken down on the road? Our mobile unit covers a wide radius — call 708-483-8554 for immediate dispatch.
Electrical & Diagnostics
Battery, alternator, starter, wiring, and trailer lighting diagnostics. Computer diagnostics across all major makes and models.
Tires & Wheels
Tire replacement, rotation, pressure checks, and wheel service to keep your fleet running safely and efficiently.
Trusted by Chicago-Area Truck Drivers & Fleet Managers
Truck owners and fleet managers trust KNI Truck Repair for reliable repairs, fast mobile service, and transparent pricing.
KNI TRUCK REPAIR got us back on the road fast. Their mobile repair service came to us, diagnosed the issue in minutes, and had the truck running the same day. No downtime, no hassle.
Marcus Thompson
Fleet Manager, Chicago Logistics
My experience was great from the start with the phone call To the end of the repair. I Had an air valve replaced and two brake chambers. I was broke down in the dock after getting unloaded. The mechanic was very knowledgeable, very professional explained, and was done in a very timely manner. I highly recommend their service and if and when I’m in the area and have trouble, they will be the first and only ones I call.
Christopher T.
Google Review - 5 stars
The guys at KNI are incredible. My truck broke down they came out to the side of the road quickly diagnose the problem got it towed to the shop and had it fixed and done in less than 24 hours. The mechanic's very knowledgeable and the whole crew was very helpful and affordable.
Joshua M.
Google Review - 5 stars
Built on reliability and years of professional truck repair
We've earned the trust of fleet operators and owner-operators across Chicago by delivering consistent, high-quality service on every job.
15+
Years of experience
Over a decade and a half serving commercial truck and trailer repair needs in Chicago.
500+
Trucks serviced
We've completed repairs and maintenance for hundreds of semi trucks and trailers across the region.
24hr
Mobile response
Our mobile repair team reaches you on the road or at your location when you need help most.
Frequently Asked Questions
Find answers about what we service, how mobile repair works, trailer service, and fleet accounts below.
Schedule Your Service Today
Call 708-483-8554 or email knitruckrepair@gmail.com. Shop hours: Mon–Fri 8AM–5PM. Mobile roadside available 24/7 within 50 miles of Melrose Park, IL.