OCD Diesel OCD Diesel
715-536-1835

Obsessed with the right answers.

Heavy-duty diesel repair for fleets, owner-operators, and the businesses that run on trucks. We find the real cause before we pick up a wrench, from deep engine work to electrical faults and module programming, in the shop or out on the road.

Call the shop Broken down? Road service
OCD Diesel's two crane-equipped service trucks parked in front of the shop on County Road G
Hours Mon–Thu 7:30a–5:30p Friday by appointment

What can we help with?

Get started here.

Shop
715-536-1835
Road service
Shop line, pick Roadside
Hours
Mon–Thu 7:30a–5:30p
Find us
W4684 County Rd G

What we're built for

Set up for the heavy work.

The tools, the trucks, and the know-how for the jobs that keep your equipment earning, and the tough ones that keep it parked.

  • An OCD Diesel technician working deep in the engine bay of a heavy truck with the cab tilted forward A technician kneeling beside an engine and transmission lowered out from under a vehicle on a lift A technician working on a dropped engine and transmission beneath a vehicle raised on a lift A technician at his toolbox behind an engine pulled out for an in-depth repair A full engine and transmission out of the vehicle on stands in the OCD Diesel shop
    Diesel repair

    Heavy, in-depth repair.

    Not just the quick stuff. Engine, aftertreatment, driveline, brakes and air: the big jobs too, done start to finish under one roof, with dealer-level diagnostics behind every job.

    See services

  • Electrical diagnostics

    Shorts, dead circuits, data network faults, and the problem that only shows up some of the time. We trace it to the wire or the module.

    Electrical diagnostics

  • ECM & module programming

    Engine, transmission, ABS and body modules, programmed and set up in-house for many modules across many makes. A new module doesn't mean a second stop.

    Module programming

  • Emergency & mobile repair

    Crane-equipped service trucks for breakdowns, job sites, and your yard. One call to the shop reaches road service.

    Road service

  • Heavy-duty tires

    Truck and trailer tires, mounted and balanced. Tires and repairs taken care of in one visit instead of two.

    Tires & more

How we work

We don't guess.We diagnose.

We test, we confirm, and then we replace. We'd rather find the real problem than sell you parts you didn't need.

How we diagnose

Fleets & businesses

Obsessed with uptime.

Business accounts with net terms, maintenance on your intervals, and a service history for every unit.

Fleet service Call about an account

Don't take our word for it

What customers say.

4.8 37 Google reviews Read on Google
The true test of an excellent mechanic is how they respond when something goes wrong. These guys stood behind their work 1000%.
Julie E.
Woke up to a pretty substantial air leak in my Peterbilt. Found these guys on Google… Had the fittings on hand and got me going quick. Bill was fair.
Dustin W.
I called from out of state and Jason helped diagnose my electrical problem, helping me get back on the road. These guys know their stuff.
Joshua B.

Rating and count as of June 2026.

Tell us what's going on.

Call the shop, or book a time and send us the details ahead of time.

Call 715-536-1835 Book service