Diesel Service and Repair in Williamston, MI

When your diesel truck needs attention, don’t trust just any auto shop. We welcome you to bring it to the diesel repair mechanics at Key Diesel and Auto Service in Williamston, MI. Diesel engines are a different breed, built for power, performance, and endurance. We specialize in diesel diagnostics and repair for a wide range of diesel vehicles.

Diesel Repair Shop Near Me

Our ASE- and GM Master Certified technicians have a deep understanding of diesel systems and are equipped to complete the job correctly the first time. Whether you’re in Williamston, Webberville, Okemos, Perry, or just passing through mid-Michigan, our shop is your trusted alternative to a dealership.

From light-duty pickups to medium-duty trucks, we service many of the most popular diesel models on the road today, including:

  • Ford Power Stroke (6.0L, 6.4L, 6.7L)
  • Chevy/GMC Duramax (6.6L)
  • Ram Cummins (5.9L, 6.7L)
  • Sprinter Vans with Mercedes diesel engines
  • Isuzu and other fleet diesel models

Whether you use your diesel truck for towing, hauling, delivery, or just as a great ride, you can count on us for knowledgeable service that protects your engine and your investment.

Diesel-Specific Services at Key Diesel and Auto Service

Diesel engines operate under higher compression ratios and different fueling systems than gasoline engines. Additionally, diesel fuel systems are more sensitive to contaminants than other systems. Dirty fuel can clog injectors and affect engine performance, potentially causing engine damage. Therefore, it is best to keep the system clean and the filter changed regularly. We utilize industry-leading scan tools and years of experience to pinpoint the root cause of issues. At Key Diesel and Auto Service, our diesel services include:

  • Advanced Diesel Diagnostics
  • Glow Plug and Injector Service
  • Turbocharger Repair
  • Diesel Fuel System Cleaning and Repair
  • Exhaust Gas Recirculation (EGR) valves and Diesel Particulate Filters (DPF) Service
  • Diesel Maintenance (oil change, coolant checks, and more)

We’re not just a general repair shop that “also does diesel.” At Key Diesel and Auto Service , diesel is our specialty. We’re a family-owned business, a NAPA AutoCare Center, and we offer a 36-month/36,000-mile warranty on most repairs. Relax in our Wi-Fi-equipped waiting area or use our convenient after-hours drop-off service.

Diesel Service in Williamston, MI

We’re proud to serve hardworking drivers and fleet owners from Williamston, Webberville, Okemos, and Perry who rely on their diesel vehicles every day. Give your diesel car or truck the care it deserves. Call us, request an appointment online, or visit Key Diesel and Auto Service at 2525 E. Grand River Ave in Williamston today.

Optimize Your Diesel's Performance – Expert Diesel Service and Repair at Key Diesel and Auto Service.

6 Warning Signs Your Diesel Fuel Injectors Are Getting Clogged | Key Diesel and Auto Service
January 30, 2026
Key Diesel and Auto Service in Williamston, MI, explains six warning signs that diesel fuel injectors are getting clogged.
The Role of Spark Plugs in Gasoline Engines vs. Glow Plugs in Diesels | Key Diesel and Auto Service
December 19, 2025
Key Diesel and Auto Service in Williamston, MI, explains the roles of spark plugs in gasoline engines versus glow plugs in diesels.
What Is The Difference Between Brake Pad and Brake Rotor Replacement? | Key Diesel and Auto Service
November 28, 2025
Key Diesel and Auto Service in Williamston, MI, explains the difference between pads and rotors and when each one typically needs to be replaced.

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