Car-Hauler & Semi Aftertreatment Service — Forced Regens, DEF & DPF

Get out of derate and back to earning — car haulers and semis, diagnosed and fixed by people who know these systems, same day in most cases, next day at the latest.
Hand wearing an orange glove pointing at a metal pipe connection with sensors and clamps in a vehicle engine.

You're At The Right Shop For This

A truck in derate or throwing aftertreatment codes doesn't wait, and neither do we — we diagnose the DPF, DEF, and SCR system, tell you straight what's actually wrong, and get you cleared to run. Most jobs go same day, next day at the latest, because the sensors and DEF parts most shops have to order are already on our shelf. Diagnosed and quoted by someone who ran this equipment, in English, Russian, or Spanish.

A Derated Truck Isn't Slow — It's Parked

Aftertreatment problems don't stay small, and they don't wait for a convenient time. Here's what putting it off actually costs.

Power Derate

The truck drops into limp mode and won't pull a loaded deck — so the cars sitting on it aren't going anywhere, and neither are you.

A Cleaning Turns Into A Replacement

Keep running a clogged DPF or a bad dosing valve and the cheap fix stops being an option — soot bakes in, related parts go with it, and a service job becomes a full component swap.

The Derate That Comes Back

A code cleared without finding the real cause lights up again on the next haul — usually miles from any shop that can actually help, right back on the shoulder.

DPF, DEF, SCR, EGR — The Whole Aftertreatment System

If it's throwing an aftertreatment code, derating the truck, or won't finish a regen, it's what we do. Told the way you'd say it, not the way the manual does.

Won't Regen / Stuck In Regen

The truck won't complete a regen or keeps trying to — we run a forced regen and find out why it couldn't do it on its own.

In Derate / Limp Mode

Speed's capped, power's gone, and there's a countdown on the dash — we get you out of derate and figure out what tripped it.

Clogged Or Failed DPF

Filter's plugged and the pressures are wrong — we clean it, or replace it when it's past cleaning, and tell you honestly which one you're actually looking at.

DEF System Faults

Dosing valve, DEF pump, DEF head, or a tank heater acting up — the parts most shops have to order, already on our shelf.

Bad DEF Quality / SCR Codes

"DEF quality" warnings, poor NOx conversion, an SCR that isn't doing its job — traced to the real cause instead of just clearing the light.

EGR Problems

Sticking EGR valve, cooler leaking coolant, EGR-related codes — sorted out before they take the rest of the system down with them.

Failed Sensors

NOx, temperature, and pressure sensors that lie to the ECM and put you in derate for no real reason — found and replaced.

Why Operators Bring Aftertreatment Work Here

Anybody can clear a code. Getting you out of derate, fixed right, and back under a load the same day is a different thing.

Back To Earning

A truck in derate isn't earning — it's parked, and every hour is freight you're not moving. We get most aftertreatment jobs done same day in most cases, next day at the latest.

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White car carrier truck loaded with multiple SUVs in a parking lot under a clear blue sky.

Parts In Stock

There's nothing worse than being told the DEF part is on order and you're down three more days. The dosing valves, sensors, and DEF components most shops have to order are already on our shelf.

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Stacked cardboard boxes with coiled hoses, yellow ratchet straps, metal cylinders, and white filters on a pallet.

What Others Miss

You've probably had a code cleared that lit right back up on the next haul. We trace the derate to what's actually causing it — diagnosed by someone who ran this equipment — so it doesn't come back.

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Two men inspecting mechanical parts on the back of a large car hauler outside a workshop.

English, Spanish, Russian

Aftertreatment work gets technical fast, and being talked past is how you end up paying for the wrong fix. We explain what's wrong and what it'll take in English, Russian, or Spanish.

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Gear-shaped puzzle with segments labeled English, Español, and Russian around a wrench icon.

Fair Prices

Aftertreatment is where shops love to sell you a whole new DPF you didn't need. We tell you straight whether it's a cleaning, a sensor, or a real replacement — and charge you for what it actually is.

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Vintage balance scale comparing a stack of dollar bills to a heavy rusty brake rotor.

Off I-80/94/90

When a derate strands you mid-corridor, the last thing you need is a long detour to the shop. We're minutes off I-80/94/90 in Burnham, IL

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Map showing Fleet Service Center near Burnham,IL, by Lake Michigan with surrounding cities and highways.

Gated Lot

Leaving a loaded hauler somewhere overnight isn't something you do lightly. If we need to keep it, it sits behind our gate, not on the street.

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Industrial building with large garage doors behind a tall black metal gate with pointed tops.

How It Works

Three steps from a derated truck to back under a load.

Call And Tell Us What's Wrong

Call and tell us what's wrong — or roll in. Give us the codes on the dash or just what the truck's doing, and we'll take it from there.

Get A Straight Diagnosis And Quote

Get a straight diagnosis and quote — from someone who's run the equipment. You'll know whether it's a cleaning, a sensor, or a real replacement before we start.

Back To Earning

Back to earning — same day in most cases, next day at the latest.

Planning The Fix Ahead?

Send us what the truck's doing and we'll come back with a straight quote on the aftertreatment work.

Truck In Derate Right Now?

Tell us the codes on the dash and we'll get you cleared and back under a load — same day in most cases.

The Job It Needed, Not The One That Pays More

Aftertreatment is where the upsell lives — a whole new DPF when a cleaning would've done it. Operators keep leaving the same note about this shop: "fair and honest, didn't overcharge." When it's a sensor or a cleaning, that's what you'll hear — not a pitch for a system you don't need.

Can't Bring It In?

If you're derated on the shoulder or stuck at a lot somewhere on the corridor, you don't have to limp it in — we come to you, same specialists, same DEF parts and sensors on the truck.

See how road service works

call now (224)278-9872
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While It's Here, We'll Handle The Rest

Car haulers are the specialty, but this is a full-service truck and trailer shop — so while the aftertreatment work is being done, the brakes, the lights, and the oil change get handled on the same visit instead of at three more shops.

Car-Hauler Repair

The hub for everything car-hauler — hydraulics, cylinders, bushings, pins, and fifth wheels, all under one roof by the specialists who do it every day.

See car-hauler repair

Two men working on a large car carrier trailer outside a garage with open doors.

Hydraulics & Cylinders

Deck won't lift, a cylinder weeping, a line that won't hold pressure — the hydraulic work most shops have to order parts for, with ours on the shelf.

See hydraulics & cylinders

Close-up of a shiny hydraulic cylinder on heavy machinery with blurred background.

Fifth Wheels

A jaw that won't lock, slop in the plate, or a mount that needs setting back where your weight rides right — fifth wheel repair, replacement, and repositioning by the specialists who do it every day.

See fifth wheels works

Fifth wheel trailer hitch with yellow warning label that reads 'NO STEP' on black and white metal surface.

Electrical

Starters, alternators, generators, lights, and the wiring that runs the length of a hauler and fails where you can't see it.

See electrical work

Gloved hand working on red electrical cables and components inside machinery or vehicle engine.

Diagnostics & Emissions Testing

Codes read and traced to what's actually causing them, plus OBD and CARB testing when it's time.

See diagnostics & testing

Panasonic Toughbook laptop displaying vehicle diagnostics inside a truck cabin.

Oil Changes & PM

Scheduled service on your terms, planned around your loads instead of a breakdown.

See oil changes & PM

Empty vehicle inspection pit with red borders inside a clean, organized auto repair garage with a truck in background.

Brakes

Shoes, drums, air systems — semi and trailer both, including the axles under your deck.

See brake service

Close-up of black brake linings with holes, placed on a metal shelf with boxes in the background.

Suspension

Air bags, shocks, ride height, plus the bushings and pins that wear first on hauler equipment.

See suspension work

Close-up of air suspension components and tire on a heavy vehicle.

Welding

Cracks, mounts, ramps and decks — fabrication and repair on the parts of a hauler that take the abuse.

See welding & fabrication

Blue welding helmet with space design resting on coiled cables and a machine beside boxes in a workshop.

A/C

Recharge, leaks, compressors — because summer in a truck without it isn't a small problem.

See A/C repair

A/C service panel with pressure gauges and screen showing system check details and controls.

Tires

Changes and repairs on truck and trailer, so a tire doesn't turn into a tow.

See tire service

A row of nine large black tires stacked vertically on a warehouse metal rack against a concrete wall.

Aftertreatment Questions, Answered Straight

The things operators ask before they bring a derated truck in — answered the way we'd tell you on the phone.

Can you get me out of derate today?
Do I actually need a new DPF, or can it be cleaned?
Aftertreatment repairs get expensive — how do I know I'm not being upsold?
Do you have the DEF parts in stock, or is it a three-day wait?
My check engine light is on but the truck runs fine — can it wait?
Can you just clear the code so I can finish my run?
Do you work on my engine make?
Do you do the CARB Clean Truck Check test too?
What if it derates on the road and I can't drive it in?
What does the diagnosis cost if it turns out to be nothing major?

Rather Plan It Out?

Send us what the truck's doing and we'll come back with a straight quote on the aftertreatment work.

Get That Truck Out Of Derate

Call and tell us what's on the dash — same day in most cases, next day at the latest.