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Semi Truck repair in Janesville, WI

On-Site Preventive Maintenance

We understand that downtime can be costly for your business, which is why we offer on-site preventive maintenance services to keep your fleet running at maximum efficiency. Our experienced technicians can perform regular maintenance tasks, including checking fluid levels, replacing filters, and inspecting for signs of wear or damage.

24/7 Roadside Assistance

We offer 24/7 roadside assistance services to our customers within a 60-mile radius of our shop, serving cities such as Madison, Rockford, Elgin, Waukesha, and more. Our roadside assistance team includes accurate ETAs, GPS location tracking, real-time updates, and the best roadside assistance team in Wisconsin.

24/7 Mobile Service

Our 24/7 mobile service includes most services you'd be able to find in our shop. With our six robust mobile units and a team of skilled mobile technicians, we can perform a range of on-site services including diagnostic checks, jump starts, light repairs, alternator/battery replacements, belt repairs, air system inspections, brake system repairs, and welding and fabrication. 

Reliable Repairs With Fast Turnaround Times

We understand that time is money, which is why we offer fast turnaround times and reliable repairs to get your vehicles back on the road as quickly as possible. Our experienced technicians use state-of-the-art equipment and techniques to diagnose and repair any issues with your fleet.

Specialized Alignment Service

We offer specialized alignment services with the largest alignment pit in the state of Wisconsin and Hunter Alignment equipment. Our team of experienced technicians can perform camber, caster, and toe adjustments to ensure that your wheels are properly aligned, reducing tire wear and improving fuel efficiency.

The Best Welders and Fabricators in Wisconsin

Our team includes the best welders and fabricators in the state of Wisconsin, ensuring that any welding or fabrication needs for your fleet are met with the highest quality workmanship.

Contact Us

Are you in the market for a trusted repair shop? Contact Block Diesel Repair today! We offer pick-up and delivery services for your convenience, as well as 3-month to 2-year warranties on our repair work.

The service these guys give is awesome. Prices are very fair, and the work they do is fantastic. Good customer service, quality work and great price.
C & T S
M&M Carriers

Jeremy Shirah

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Great job. My mechanic Mitch did an incredible job. Arrived exactly on time. Finished the repair in record time and the price was very reasonable. And all on a Sunday morning. Great job! Keep up the awesome service.

Brit Payjack

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Thank you so much to Greg. We had an emergency after hours and he quickly got us and our horses back on the road. We are beyond grateful.

Tim Braun

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They got me right in when I needed a repair during a trip. Fair pricing with quality work. Went there worried since on the road repairs can go so wrong but left very happy.