Tri-State Auto Diagnostics Carries Cooper Tires

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Tri-State Auto Diagnostics is an AC Delco Service Center


We Provide Fast, Affordable Auto Repairs and Auto Diagnostics.
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Welcome To Tri-State Auto Diagnosics

Every day, you rely on your vehicle to safely transport you and your family everywhere you need to go.  You will not get the runaround at Tri-State Auto Diagnostics, we will.  Our ASE Certified Technicians have the skills and innovative tools necessary to get your vehicle back on the road quickly without any unnecessary repairs or costs.

Tri-State Auto Diagnostics has been in business since 1997 and is located at 5200 Old Highway Rd, on the west end of Dubuque, Iowa, just off of Dodge St.  We operate a state-of-the-art automotive repair shop with expertise in all makes and models of cars and trucks.  We are an AC Delco service center with ASE Certified Technicians.  You can count on us to get your vehicle back on the road quickly and affordably, and keep your vehicle on the road dependably.
"Joe  Mckillip and his crew are some of the best mechanics in the city.  They are honest and dependable."
— Mark

Our Full Service Vehicle Repair Service Will Get You Back on the Road and on Your Way to Where You Need to be.

"I've been taking our vehicle's to Joe for at least 10 years and have complete trust in him."
— Garrett