Truck down? We come to it.
Mobile diesel and heavy duty repair for semis, fleets, and work trucks. Dealer level scan tools and 20+ years of experience, brought to your yard, your jobsite, or the side of the road.
What We Fix
Heavy duty repair, done on site. If it runs on diesel and it is down, call us.
Diesel Engine Repair
The big jobs. Diagnostics, derates, low power, leaks, and major engine repairs on Cummins, Detroit, PACCAR, Volvo, Mack, International, and Cat, done where the truck sits.
DPF, DEF & EGR
Regens, DEF and SCR faults, NOx sensors, and derate codes.
Learn more →Air Brakes
Air leaks, chambers, slack adjusters, valves, and ABS.
Learn more →Electrical & Wiring
Wiring, lighting, charging, modules, and hard to find faults.
Learn more →No Start & Charging
Batteries, starters, alternators, and fuel delivery.
Learn more →Cooling Systems
Radiators, water pumps, hoses, fan clutches, overheating.
Learn more →Suspension & Driveline
Air bags, leveling valves, shocks, U-joints, steering.
Learn more →Truck A/C
Leak checks, compressors, condensers, and recharge.
Learn more →Trailer Repair
Lights, brakes, air lines, ABS, and landing gear.
Learn more →Fleet Maintenance
We service your trucks at your yard. Less downtime.
Learn more →Roadside Repair
Broken down on I-94 or a jobsite? We come to you.
Learn more →Built Around Uptime
Fleet Service
Every trip to the shop takes a truck and a driver off the road. We service your fleet at your yard, so your trucks keep earning.
- Maintenance and repairs at your location
- One number to call when a unit is down
- Clear invoices for every unit
- Trucking companies, contractors, and delivery fleets
Set up a fleet account
Two trucks or twenty. Call or text and we will set up a plan that fits how you run.
Call 847-630-4348 Fleet detailsMakes & engines we work on
Service Area
Based in Grayslake. We cover about 45 minutes around Gurnee and Grayslake, across northern Illinois and southern Wisconsin.
The Electrical Gremlin Specialist
Lights that come and go. ABS faults nobody can find. A truck that dies and then starts fine an hour later. Intermittent electrical problems are where most shops start throwing parts at the truck. Dave traces them to the actual cause and fixes it once.
Meet Dave
Dave has been turning wrenches for more than 20 years. When you call, you talk to Dave. When the truck gets fixed, Dave is the one fixing it. No call center, no runaround, just a mechanic who does the job right and tells you the truth about your truck.
When he isn't working on yours, he's usually working on his own.
What Customers Say
“Great work, fair price, and an all around good experience.”
Google review“He's great with communication and has great pricing.”
Google review“My Jeep is back to its old self and I am thrilled with the service I received.”
Google reviewCommon Questions
Do you come to our yard or jobsite?
Yes. We are fully mobile. We repair trucks at your yard, jobsite, dock, or roadside anywhere in our service area.
What kinds of trucks do you work on?
Semi trucks, box trucks, dump trucks, trailers, work trucks, and diesel pickups. Freightliner, Peterbilt, Kenworth, International, Volvo, Mack, and more.
Is there a booking fee?
Yes. Booking online requires a $250 booking fee, paid when you schedule. We explain the repair and you approve it before any work starts.
What are your hours?
Monday through Saturday, 9am to 6pm. We are closed on Sundays. If you reach out after hours, call or text and we will get back to you first thing the next business morning.
Do you set up fleet accounts?
Yes. Whether you run two trucks or twenty, we can service them on a schedule at your location and handle repairs when a unit goes down.
Do you also work on cars?
Yes. For cars, SUVs, and light trucks, visit our residential site, Dave's Mobile Garage.
Get Service
Fastest: call or text
847-630-4348Mon to Sat · 9am to 6pm · Closed Sundays
Tell us the unit, where it is, and what it is doing. If the truck is down right now, call or text. That is the fastest way.