Reviewed : 10/22/2026

Comment : I've used several shops over the years in Tulsa and GJT is the best hands down. I can always count on them to diagnose and fix any issues my truck has. 10/10 would recommend.

Reviewed : 09/26/2026

Comment : My 2009 Ford F350 diesel started having problems after years of reliable service, and required injector pump replacement. I have used Gary Johnson to service and repair the fleet of vehicles we had in our previous business, so I was familiar with their honesty, professionalism, and quality of work. They do the work required, and they do it well. In a timely manner, and with quality parts. My truck runs better than ever and I know the work was done right. I highly recommend GJ if want the most out of your repair dollars.

Reviewed : 09/24/2026

Comment : Excellent shop! They fought the warranty company to pay for my entire engine to get replaced and it runs perfect now. The customer service is top notch. They'll have me as a customer for life.

Reviewed : 09/24/2026

Comment : I have a 1993 gmc sierrah with a 6.5 detroit in it. Anyone in the diesel world knows they are great and terrible in their own right. Well the truck had been broke down for four years. I wanted to save the motor and transmission and keep it original as possible as it was my late grandpas. No one really works on these anymore and parts are getting harder and harder to find. I sent it over to Gary johnstons and told them im in no rush, just get it fixed. Well they nailed the repair, it had several electrical issues that were in very hard to see and diagnose locations. They got the truck back up and running and kept it original as possible. 10/10 fully recommend ??

Reviewed : 09/21/2026

Comment : Honest, fair & fixed the problem! ??

Reviewed : 09/18/2026

Comment : Please don't spend money here; they like to scream at and get violent with Fedex drivers even when an honest mistake was made. Unprofessional people are working the front counter.

Reviewed : 09/04/2026

Comment : Very helpful, very knowledgeable. Always use them for any mechanical needs.

Reviewed : 08/26/2026

Comment : Made appointment week advance. Company has reminder texts sent to my phone. I bring truck the night before for my 8am appt. Just to check a problem to get a quote. Truck was not looked at. Picked up truck after the day of my appointment, still my wasn't checked. Appointment is not a appointment here at Gary Johnston, its considered a walk-in. Thats how I was treated.
Shop lied on response to this post shop never said mechanic was overheated prior to pickup vehicle.

Reviewed : 08/21/2026

Comment : I am always so impressed and grateful for the guys at Gary Johnston. Won’t take my Dodge anywhere else.

Reviewed : 08/18/2026

Comment : I took an 02 Ford in for the AC not working and an oil leak. I was really happy driving home with an AC working in the car. They were reasonably priced and the work was great. The oil leaks were more extensive and they had the car for a day and a half. They informed me everything they had done and what my next repairs may be. Overall a great bunch of guys and the work was professional and dependable. I would highly recommend them to anyone who needs some mechanical repairs.