Auto & Truck Repair & Maintenance,  Semi Truck & Diesel Repair, and Mobile Repair & Roadside Assistance

in Plainfield, IN and the Surrounding Areas

Gloved hands inspecting a car engine under the hood in a garage

Auto & Truck Repair & Maintenance

We provide full service car care for most makes and models of vehicles.

Mechanic working on a metal engine block in a workshop

Semi Truck & Diesel Repair

Our team specializes in diesel repair and maintenance.

Person using orange jumper cables to connect a car battery in an engine bay

Mobile Repair & Roadside Assistance

We can come to you to fix everything from daily drivers to excavators.

Plainfield Diesel & Auto Repair

Honest Service. Fair Pricing

Locally owned and operated Plainfield Diesel & Auto Repair provides comprehensive in-shop and on-site auto repair, truck repair and diesel repair in Plainfield, IN for all daily drivers, commercial vehicles and heavy equipment.

Full Service Auto Repair

Car & Truck Repair

Semi Truck Repair

Fleet Repair

Heavy Equipment Repair

Gas & Diesel Engine Repair

Plainfield Diesel & Auto Specialist logo with black truck, gear, wrench, and smoke on dark badge

Transmission Repair

Auto Maintenance

Diesel Maintenance

Roadside Services

On-Site Repair & Diagnostics

Call First, Appointment Only

White MG MGB convertible with a black top parked in a garage. The car has chrome trim and black wheels.

Honest Auto, Truck & Diesel Repair When You Need It


Whether your commuter is giving you trouble and you need roadside assistance, your big rig requires maintenance, or an excavator is due for hydraulic services at the job site, our team of skilled technicians is ready to help. Based in Plainfield, our local car and truck mechanics are available seven days a week to provide services in our shop or at your location in Hendricks County and beyond. From factory maintenance, including oil changes and fluid services, to complex diagnostics and repairs for engines, transmissions and electrical systems, there is no issue we can’t solve for just about any gas or diesel vehicle. We invite you to give us a call to schedule an appointment or to request a quote for semi truck, fleet vehicle or other auto repair in Plainfield or the surrounding area. We look forward to providing you with honest service at a fair price.

The expert mechanics at Plainfield Diesel & Auto Repair are proud to help local drivers, fleet managers and owner/operators in Plainfield, Avon, Indianapolis and the surrounding areas care for their vehicles. To ensure we can provide the best automotive services for all types of cars, trucks and fleets, our team routinely invests in the latest diagnostic and repair tools, undergoes routine training to stay up to date with the latest technology and techniques, and strives to provide high quality services at affordable rates. We take customer service seriously and will always provide clear communication regarding your vehicle and make honest recommendations regarding services it may require.

Car interior with open laptop on passenger seat and dashboard visible, suggesting a mobile workstation.
Row of automotive brand logos on a white background
Collage of eight truck and vehicle brand logos on a white background.

Our local auto repair and truck shop services all types of vehicles, including daily drivers, pickup trucks, contractor vehicles, work trucks, diesel trucks, trailers, big rigs and heavy equipment. We aim to provide fast turnaround times that don’t sacrifice quality, because we know that downtime costs you money. From in-house maintenance and repairs to roadside assistance and on-site vehicle services, trust Plainfield Diesel & Auto Repair to keep you moving. Give our Plainfield auto shop a call at 317-758-8099 to learn more about our gas and diesel services or to request an appointment at your convenience.

Customer Reviews

Thanks for trusting Proline Auto Care with your vehicles.

G and stars

Matt and his team were very nice guys, very easy to talk to and care about your vehicle not just mechanics trying to price gouge you and hurry the process along which is huge in my book. I'll definitely use their services again if needed. Thanks gentleman!

- M. B.

Blog

We invite you to monitor our News Blog for informative articles.

By Plainfield Diesel & Auto Repair • October 5, 2026
Because semi trucks regularly carry heavy loads and travel long distances, suspension components can suffer significant stress and wear. Problems with shocks, springs, bushings, air suspension components, or other parts can affect how the truck performs and may create additional safety concerns. Recognizing the warning signs of a suspension problem can help you arrange professional service before a minor issue becomes more serious. At Plainfield Diesel & Auto Repair, our local diesel mechanics provide expert semi truck suspension repair in the greater Plainfield, IN area. Here’s a look at four common signs of a semi truck suspension issue. Excessive Bouncing After Bumps A properly functioning suspension should help control the truck’s movement after it encounters bumps. If the truck continues bouncing excessively after going over a bump, worn or damaged shocks may be contributing to the problem. Excessive bouncing can affect ride stability and may make it more difficult to maintain consistent control, particularly at highway speeds. Uneven Tire Wear Suspension problems can affect how the tires contact the road. If you notice unusual or uneven wear across one or more tires, a suspension component may not be supporting the vehicle properly. Uneven tire wear can also have other causes, including alignment or inflation problems, so having the suspension and tires inspected can help identify the underlying issue. The Truck Sits Unevenly A semi truck that appears to sit lower on one side or at one end may have a problem with a suspension component. Worn or damaged springs, air suspension issues, or other failures can affect the truck’s ride height and weight distribution. Changes in ride height should be investigated promptly because they can affect handling and the way the truck carries its load. Unusual Suspension Noises Clunking, rattling, squeaking, or other abnormal noises coming from the suspension can indicate worn, loose, or damaged components. These sounds may become more noticeable when driving over bumps, turning, or braking. Because different suspension problems can produce similar symptoms, professional inspection is important for determining exactly what needs attention. Semi Truck Suspension Repair in Plainfield, IN For expert semi truck suspension repair in Plainfield and the surrounding area, contact Plainfield Diesel & Auto Repair at  317-758-8099  . At our nearby truck repair shop, we can properly handle your big rig’s repair and maintenance needs. Feel free to give us a call to schedule semi truck repair or maintenance in greater Plainfield!
By Plainfield Diesel & Auto Repair • September 7, 2026
Regular oil changes are one of the most important forms of preventive vehicle maintenance. As oil ages, it can become contaminated and lose some of its ability to protect the engine. Following the recommended oil change schedule can help maintain performance and potentially prevent expensive repairs. At Plainfield Diesel & Auto Repair, we provide full-service oil changes in the greater Plainfield, IN area. Here are four important reasons to stay consistent with your oil changes. Protects Internal Engine Components Engine oil creates a protective layer between moving components such as pistons, bearings, camshafts, and other parts. This lubrication helps minimize friction and reduces metal-to-metal contact. As oil becomes old or contaminated, it may not provide the same level of protection. Replacing it on schedule helps ensure the engine continues receiving clean, effective lubrication. Helps Prevent Excessive Engine Wear Every mile driven contributes to normal engine wear, particularly when the vehicle is operated under demanding conditions. Dirt, metal particles, and other contaminants can accumulate in aging oil and potentially contribute to abrasive wear. Regular oil changes remove old, contaminated oil and replace it with fresh oil designed to protect the engine. This simple maintenance task can contribute to longer engine life. Supports Proper Engine Temperature Engine oil doesn't just provide lubrication. It also helps absorb and transfer heat away from internal components. When oil becomes contaminated, it can potentially increase the chances of the engine running too hot. Staying current with oil changes helps maintain the properties the oil needs to perform effectively, supporting proper engine temperature management. Maintains Performance and Efficiency Fresh engine oil can help the engine operate smoothly. Old oil can become thick, dirty, or degraded, potentially affecting lubrication and oil flow. Maintaining the correct oil level and changing the oil according to the recommended schedule can help support consistent engine performance. It may also contribute to optimal fuel-efficiency, particularly when combined with other routine maintenance. Full-Service Oil Change in Plainfield, IN For expert auto maintenance in Plainfield and the surrounding area, contact Plainfield Diesel & Auto Repair at  317-758-8099  . We provide top-quality auto repair for commuter vehicles and semi trucks. Feel free to give us a call to schedule an appointment for car and truck care in greater Plainfield, IN!