24/7 Roadside Truck Repair
Broken Down on the Shoulder? We Come to the Truck.
Rig Doctor answers the phone at 2am and rolls a fully stocked service truck to your rig anywhere in the Cedar Valley and along I 380, US 20 and US 218, so the load keeps moving without a tow.
At a Glance
- Answered
- Live, by a technician, at any hour
- Covers
- Semis, trailers, buses, RVs and farm equipment
- Brings
- Air, electrical, tire and diagnostic tooling on board
- Costs
- Quoted on the phone before anyone is dispatched
A breakdown is not really a mechanical problem. It is a clock problem. Hours of service burn, the receiver moves your appointment, the reefer runs down and the driver sits. Rig Doctor exists to shorten that clock. You call, you get a technician on the phone rather than a call center, and a stocked truck heads your way.

Most roadside work never needs a shop. A blown air line, a dead battery bank, a chafed harness, a stuck slack adjuster, a lost drive tire, a starter, a fuel filter, a cracked mud flap bracket. All of it is field work when the tech shows up with the right parts already on the truck. That is the whole trade. Diagnose it on the shoulder, fix it on the shoulder, release the truck.
When a job genuinely belongs in a bay, you get told that straight away instead of watching labor hours pile up on the side of the road. A clear read on what failed, what it takes to fix it and whether the unit is safe to limp is worth as much as the repair itself, because it lets you make the call about towing rather than having it made for you.
The service truck carries air hose and fittings, governors, glad hands, chambers, lighting, connectors, batteries, filters, fluids and a working selection of new and used commercial tires. The reason so many reviews mention parts is simple. A tech who has to leave for parts turns a two hour call into a six hour one.
What That Covers
- Live answer at any hour, including nights, weekends and holidays
- Diagnosis and repair on the shoulder, in the lot or at the dock
- Air, brake, electrical, tire, fuel and diagnostic work in one visit
- Common failure parts already stocked on the service truck
- Straight answer when a job truly needs a shop
Read the Symptom
What It Usually Means
Air pressure dropping and the warning buzzer sounding
A leak somewhere in the supply, service or parking circuit. Do not release the brakes and roll to find it. Call from where you sit.
Dash lit up and the engine derated
The ECM is protecting something. It may be aftertreatment, it may be a sensor, it may be a real fault. Fault codes read on site beat guessing every time.
Crank but no start
Fuel, air, power or the starting circuit. Four systems, one diagnosis, and a jump start is only the right answer for one of them.
Bang, then a pull to one side
A tire is gone. Get off the travel lane if the unit will move safely and stay out of the shoulder side of the cab.
Other Work We Do
Where to Find Rig Doctor LLC
10145 Independence Ave, Waterloo, IA 50703
Call the Doc and describe what it is doing.
One number, answered by a technician, at any hour.