Auto Repair

Our auto repair shop is conveniently located in Tulsa, OK. Our quality ASE (Automotive Service Excellence) certified mechanics at Gary Johnston Truck & Auto employ today’s latest automotive technology and are equipped to handle all major and minor auto repair services on foreign and domestic vehicles. Below are some of the many auto repair services that we offer:


  • A/C Services
  • Belt & Hose
  • Filter Replacement
  • Brakes
  • Cooling System
  • Courtesy Check-up
  • Diesel Engine Repair
  • Drivability Diagnosis
  • Electrical System
  • Diagnosis & Service
  • Emissions
  • Engine Repair
  • Engine Replacement
  • Fleet Service
  • Fuel System
  • Hybrid Repair
  • Muffler/Exhaust
  • Oil Change
  • Performance
  • Suspension Repair
  • Timing Belt Replacement
  • Tire Replacement
  • Transmission Service
  • Wheel Alignment
  • Wheel Replacement
  • Preventive Maintenance 30/60/90k

We invite you to take a look at our Diesel Shop. We specialize in Diesel Truck Repair. Isuzu NPR, NQR, Cummins Diesel Engines, Powerstroke and Duramax. We use the same factory diagnostic equipment used by the dealership. We effectively repair these trucks and keep you and your diesel going strong.

BG Products, Inc., maintains a Quality and Environmental Management System to provide products that meet or exceed customer expectations while reducing the environmental impacts of its operations, activities, products and services. BG Products, Inc., the leading manufacturer and supplier of automotive fuel and oil conditioners, specialty chemicals, greases, tools and equipment, is ISO 9001 and 14001 certified.

Trying to increase you diesel power plus fuel economy. Diesel fuel systems can rapidly accumulate deposits in the fuel lines, injector pump, fuel injectors and combustion chambers. This causes a number of drivability issues, or even engine failure. Unmatched in the industry, BG’s line of diesel fuel products and equipment can restore diesel fuel economy or solve nearly any diesel fuel system issue. Contact Johnston Diesel Repair for a BG Diesel Injector Flush for your diesel car or truck, We also offer induction services for your CRD Truck to keep the high pressure common rail fuel system clean and working as designed. We are one of only a few shops that are BG certified in Tulsa, Ok.

Oil and Oil Filter Service
Experts recommend changing the oil and oil filter in your vehicle every 3 months or 3,000 miles, whichever is first. It’s an essential way to maximize engine protection.

Cooling System Service
We are happy to flush your cooling system, perform a pressure test, and check hoses, caps and connections.

Air Conditioning Service
One of our trained air conditioning specialists will inspect your car’s air conditioner, all NC lines, evaporator and compressor for leaks and wear.

Driveline Service
Remove old worn-out gear oil from the front and rear differential and transfer case.

Fuel/Air Induction Cleanup
Using specialized equipment, our technicians will quickly and effectively clean intake manifolds, ports, intake valves and combustion chambers and install injector cleaning additives in your tank. This service will restore lost power and performance and will reduce harmful exhaust emissions.

Power Steering Flush
Our technicians use a powerful cleaner to dissolve gum and varnish in your car’s power steering unit. We also flush old, worn-out and contaminated fluid and install fresh new fluid fortified with a special antioxidant and anti-wear ingredients to prevent expensive mechanical failure.

Transmission Repair
Using the latest in state-of-the-art technology, we will install a safe and effective cleaner to suspend harmful varnish and sludge from the transmission valve body, torque converter and lines. We will also install new high-tech fluid with conditioners to make sure your transmission runs smoothly. Our builder has been repairing transmission for 20 years now!