Semi Truck Repair in Zion, IL
Full-Service Diesel Repair, One Shop
Semi trucks fail in predictable ways: engine performance loss, after-treatment (DPF/SCR/EGR) faults, electrical gremlins, worn suspension components, and brake wear. Our techs work on Class 6-8 trucks across all of these systems, in bays sized for full tractors, at our own paved yard in Zion, IL, just off Route 173 near I-94.
What We Repair
- Diesel engine repair and performance diagnostics
- After-treatment system repair (DPF, SCR, EGR)
- Electrical system and wiring harness repair
- Suspension component repair and replacement
- Brake system service (air and hydraulic)
Our Process
- Diagnose — we identify the root cause, not just the symptom.
- Quote — you get a straight number before any work starts.
- Fix — OEM and OEM-equivalent parts, worked in our own bays.
- Road — back on I-94 with the issue actually resolved.
Built for Drivers Who Can't Afford Downtime
No shared lot or third-party delay — drive straight in.
We find the actual cause before giving you a number.
Repairs built to last, not just pass today.
Most shops punt these jobs elsewhere — we don't.
4.9★ from 350+ Google Reviews
“I’ve been to a lot of shops, and RT Group is one of the few that actually does what they say. Rolled in with an issue on my trailer — no lights, busted wire. They got me in quick, showed me exactly what was wrong, and had it fixed that same day.”
“Brought my Freightliner Cascadia to RT Group after an air leak and brake issues. The mechanics found the problem quickly, explained what needed to be repaired, and got the truck back on the road the same day. No guessing, no unnecessary work, no surprise charges.”
“Great people working. Very professional and do quality work. We came in for some electrical issues on the trailer after another road service made a big mess there. They found the problem and fixed it quickly. Highly recommend this place.”
Common Questions
How far off I-94 is RT Group?
Do you work on all truck makes?
Can you diagnose a check-engine light or after-treatment fault?
Do I need an appointment?
Can you handle a full fleet inspection or PM cycle?
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