Truck Diagnostics & Electrical Repair Services in Janesville, WI

Every mechanic knows that the first step in a successful repair is pinpointing the cause of the damage. At Block Diesel Repair in Janesville, Wisconsin, our technicians have up-to-date, specialized training in the most advanced diagnostic tools, best practices and electrical repairs in the industry.

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Electrical System Maintenance

Our team of certified technicians has a thorough understanding of diagnostics and electrical systems. We have invested heavily in industry-leading diagnostic equipment and training, with technicians who know electrical systems inside and out. Our experts take pride in their knowledge of electrical system maintenance.

Battery Maintenance

Batteries are a key component of any electrical system, and we recommend regular testing to ensure they're in good working order. Our team can also replace the battery if necessary and perform any other maintenance needed to keep your electrical system in top condition.

Computer Diagnostics

Modern heavy-duty diesel trucks rely heavily on computer systems, making it essential to have reliable computer diagnostic tools and services to ensure you capture issues before they become larger problems. Our diagnostic checks prevent future problems by allowing us to spot areas of concern before they escalate. By detecting and addressing potential issues early on, we can help extend the lifespan of your truck and save you money on costly repairs down the line.

ECU Repair Service

The engine control unit (ECU) is a critical component of your truck's onboard computer system, responsible for regulating fuel injection, power distribution, and other vital functions. At Block Diesel Repair, we understand that replacing an ECU system can be costly and time-consuming, which is why we provide efficient and affordable repair and replacement services. With our expertise and state-of-the-art diagnostic tools, we can quickly identify and address any issues affecting your truck's ECU system.

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Bring your fleet to Block Diesel Repair in Janesville, Wisconsin, for our expert diagnostic and electrical repair services!

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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.