Heavy-Duty Diesel Truck Repair in Park City, IL
Near Waukegan · 10 min from I-94
Big Truck & Trailer Repair diagnoses and repairs heavy-duty diesel trucks at its shop in Park City, near Waukegan, Illinois. The shop works on Volvo, Kenworth, Freightliner, Peterbilt and Mack trucks with Cummins, Detroit, PACCAR, Volvo and Cat engines. Initial computer diagnostics often takes about an hour, depending on the problem.
- ≈ 1 hrComputer diagnostics
- 17+ yrsIn business
- 4.8 ★115 Google reviews
- 10 minFrom I-94

Diesel work handled in the shop
- Computer diagnostics and fault codes
- Electrical repair
- DEF system service
- Valve adjustment
- Transmission diagnostics and repair
- Engine cooling-system service
- Preventive maintenance (PM) service
- Brakes, suspension and heavy-duty alignment
The approach is simple: diagnose first, then repair with a plan. Electronic and aftertreatment faults are identified first. You receive the diagnosis and recommended scope before any repair work begins.
Common problems we diagnose
- Check-engine light and active fault codes
- DEF, SCR and derate problems
- No-start conditions
- Overheating and cooling-system faults
- Turbocharger problems
- Electrical and sensor faults
Trucks and engines
Volvo, Kenworth, Freightliner, Peterbilt, Mack
Cummins, Detroit, PACCAR, Volvo, Caterpillar (Cat)
Not sure about your model? Call (847) 599-1566 with the truck, the symptoms and any fault codes before you come in.
Broken down on the road?
If the truck can't make it to the shop, the 24/7 mobile road service may be able to handle engine diagnosis, aftertreatment (DPF, DEF, SCR) derates and shutdowns, fuel system, turbocharger and fault-code problems on-site, up to 150 miles from Park City, depending on location, safety and parts availability. Call the road-service line at (224) 400-0400.
What drivers say
“Andy is the best — he’ll tell you right away what’s wrong with the truck, and what could be done later versus what needs to be done now. He’s a very honest guy.”
Patryk, Google review
“My Freightliner Cascadia developed a problem with the differential leaking, differential lock failure, air leak, and HSA not working. He quickly diagnosed the issue, acquired the necessary parts, and within two hours I was back on the road at a very reasonable fee.”
Richard Balayo, Google review
More reviews · 4.8 on Google from 115 reviews
Questions about diesel repair
What diesel engines does the shop work on?
Cummins, Detroit, PACCAR, Volvo and Caterpillar (Cat) engines, in Volvo, Kenworth, Freightliner, Peterbilt and Mack trucks. Call (847) 599-1566 about your specific model and problem before you come in.
How long does a diesel diagnostic take?
Initial computer diagnostics often takes about an hour, depending on the problem. You receive the diagnosis and recommended scope before any repair work begins.
Can you fix DEF problems and derates?
Yes. DEF system service and electrical repair are done in the Park City shop. If the truck is already derated or shut down on the road, the 24/7 mobile unit may be able to handle aftertreatment (DPF, DEF, SCR) repairs on-site, depending on location, safety and parts. Call (224) 400-0400.
Do I need an appointment for diesel repair?
Calling ahead is recommended. Call (847) 599-1566 and describe the truck, the symptoms and any fault codes so the shop can confirm availability. You can also come in directly during shop hours: Monday–Friday 7 AM–11:30 PM and Saturday 7 AM–1 PM.
Location and hours
3627 Washington St, Park City, IL 60085, in Park City, near Waukegan, Illinois, about 10 minutes from I-94. Monday–Friday 7 AM–11:30 PM, Saturday 7 AM–1 PM, Sunday closed. Open in Maps
Check engine light on? Call the shop.
Describe the truck, the symptoms and any fault codes, and the shop will confirm when it can take it.
Call the Shop: (847) 599-1566