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 June 5, 2026
When you spend long hours behind the wheel, a working air conditioning system is more than just a comfort feature, it is essential for driver comfort, focus, and safety. If your semi truck air conditioner stops blowing cold air, struggles to cool the cab, or fails completely, it can make long hauls miserable, especially during warmer months. Understanding the most common causes of semi truck AC failure can help drivers catch problems early and avoid larger repair bills. If you run into semi truck AC trouble near Indianapolis, such as the following, remember Plainfield Diesel & Auto Plainfield Diesel & Auto Repair is here to help. Refrigerant Leak One of the most common causes of semi truck AC problems is a refrigerant leak. Over time, seals, hoses, fittings, and connections can wear out or become damaged, allowing refrigerant to slowly escape from the system. Low refrigerant levels often lead to weak cooling performance or warm air blowing from vents. A repair shop typically diagnoses leaks using pressure testing, UV dye, or electronic leak detection equipment before replacing damaged parts and properly recharging the system. A/C Compressor A failing AC compressor is another frequent cause of cooling problems. The compressor is responsible for circulating refrigerant throughout the air conditioning system, and when it wears out or fails, cooling performance quickly drops. Drivers may hear unusual noises, notice inconsistent cooling, or experience complete AC failure. Repair usually involves diagnosing compressor operation, checking electrical connections, and replacing the compressor if necessary. Truck Air Conditioner Electrical Problems Electrical problems can also prevent semi truck AC systems from functioning properly. Blown fuses, damaged wiring, faulty sensors, failing switches, or control module issues may stop the system from engaging altogether. During diagnostics, technicians inspect wiring, test system voltage, verify electrical communication, and repair or replace failed components to restore operation. Condensor Blocked condensers, clogged cabin filters, and ventilation problems are also common contributors to poor cooling performance. Dirt, road debris, and contaminants can restrict airflow and make the system work harder than necessary. Shops often clean or replace clogged components to improve airflow and system efficiency. Semi Truck A/C Repair Near Indianapolis In some cases, heating and cooling blend door problems inside the HVAC system may prevent cool air from reaching the cab properly. A technician may inspect actuators, controls, and internal components to identify airflow issues. If your big rig AC system is not keeping up, Plainfield Diesel and Auto Plainfield Diesel & Auto Repair provides professional semi truck AC repair in Plainfield, helping truck drivers throughout Hendricks County and the surrounding Indianapolis area stay comfortable and road ready. To schedule semi truck repair in Plainfield, IN , please call  317-758-8099  to speak with a helpful team member.