Yes! At Johnston Truck Service, we specialize in servicing a wide range of diesel engines, including Cummins, Detroit Diesel, and Caterpillar. Our experienced technicians handle everything from routine maintenance and diagnostics to major repairs and engine overhauls. We ensure your diesel truck stays reliable and performs at its best, whether it’s a fleet vehicle, owner-operator truck, or commercial rig.

We also provide advice on preventative maintenance to help extend the life of your engine and reduce unexpected downtime.

Yes! At Johnston Truck Service, we repair and service a wide range of diesel trucks, including Ford Powerstroke, Duramax, and Ram Cummins. Our skilled technicians handle everything from routine maintenance, diagnostics, and fuel system repairs to major engine overhauls.

Whether you’re an owner-operator, part of a fleet, or just need reliable truck repairs near Hickory, NC, we make sure your diesel truck is running safely and efficiently. We also provide guidance on preventative maintenance to help keep your truck on the road longer and minimize costly downtime.

Yes. At Johnston Truck Service, we use professional diesel diagnostic equipment to accurately diagnose check engine lights and fault codes on commercial trucks and diesel pickups. Our technicians can identify engine, emissions, electrical, fuel system, and aftertreatment issues to determine the exact cause of the problem — not just clear the code.

Whether you're experiencing power loss, derates, starting issues, or warning lights, we provide thorough diagnostics to get your truck repaired correctly and back on the road quickly. We service trucks throughout Hickory, Newton, Conover, Statesville, Morganton, and surrounding areas.

Yes. Johnston Truck Service provides complete diesel engine repair and replacement services for commercial trucks and diesel pickups. Whether your engine needs minor repairs, component replacement, or a full engine swap, our experienced technicians can diagnose the issue and recommend the best solution for your truck and budget.

We repair and replace major engine components including turbos, injectors, fuel systems, cooling systems, gaskets, and internal engine parts. If a full replacement is necessary, we can install quality remanufactured or replacement diesel engines to get your truck back on the road reliably.

Our goal is to provide honest recommendations, efficient turnaround times, and dependable repairs for drivers and fleet operators throughout Hickory and the surrounding areas.

If you’re experiencing loss of power, excessive smoke, knocking, overheating, or engine failure, contact us to schedule a diagnostic inspection.

Yes. Johnston Truck Service diagnoses and repairs overheating diesel engines for commercial trucks and diesel pickups. Overheating can be caused by issues such as coolant leaks, failed thermostats, water pump problems, clogged radiators, cooling fan failures, head gasket damage, or EGR and aftertreatment system issues.

Our technicians perform a complete cooling system inspection to identify the root cause of the problem — not just treat the symptoms. Addressing overheating quickly is critical to prevent severe engine damage and costly repairs.

If your truck is running hot, losing coolant, or showing temperature warnings, contact us right away for professional diesel diagnostics and repair in Hickory and the surrounding areas.

Yes. Johnston Truck Service provides professional oil changes for diesel trucks, including commercial trucks, semi-trucks, and diesel pickup trucks. Regular oil changes are essential to protecting your engine, maintaining performance, and preventing costly repairs.

We use high-quality diesel engine oils and filters designed to meet manufacturer specifications. During your service, our technicians also inspect key components such as fluid levels, belts, hoses, and filters to help identify potential issues early.

Yes. Johnston Truck Service provides complete brake and suspension repair services for commercial trucks, semi-trucks, and diesel pickups. Properly functioning brakes and suspension systems are critical for safety, performance, and DOT compliance.

We service air brake systems, brake chambers, slack adjusters, drums, rotors, pads, air lines, and ABS components. Our technicians also inspect and repair suspension components including leaf springs, shocks, bushings, airbags, torque arms, and alignment-related issues.

If you’re experiencing vibration, uneven tire wear, pulling, poor ride quality, or braking problems, our team can diagnose the issue and perform the necessary repairs to keep your truck operating safely and reliably.

We proudly serve Hickory and surrounding areas with dependable commercial truck brake and suspension service.

Yes. Johnston Truck Service diagnoses and repairs cooling system problems on commercial trucks, semi-trucks, and diesel pickups. A properly functioning cooling system is essential to prevent overheating and protect your engine from serious damage.

We service radiators, water pumps, thermostats, coolant leaks, hoses, heater cores, cooling fans, and EGR cooling components. Our technicians perform a complete inspection and pressure test to identify the root cause of the issue and make the necessary repairs.

If your truck is running hot, losing coolant, or showing temperature warnings, we can quickly diagnose the problem and get you back on the road safely.

Contact Johnston Truck Service for professional diesel cooling system repair in Hickory and the surrounding areas.

Yes. Johnston Truck Service diagnoses and repairs electrical issues on commercial trucks, semi-trucks, and diesel pickups. Modern diesel vehicles rely heavily on electronic systems, and electrical problems can affect performance, starting, lighting, sensors, and engine operation.

Our technicians use professional diagnostic equipment to identify wiring problems, faulty sensors, battery and charging system issues, starter and alternator failures, lighting malfunctions, and control module concerns. We focus on finding the root cause of the issue — not just replacing parts unnecessarily.

If you’re experiencing hard starts, warning lights, electrical failures, or intermittent issues, contact Johnston Truck Service for professional diesel electrical diagnostics and repair in Hickory and the surrounding areas.

Yes. Johnston Truck Service provides 24/7 mobile commercial tire repair near Hickory, NC and throughout Catawba County. Our mobile service truck is equipped to handle many common roadside and emergency repairs to get you back on the road as quickly and safely as possible.

Johnston Truck Service proudly provides commercial tire repair and mobile roadside service throughout Hickory and the surrounding areas of Catawba County. We regularly service customers in:

• Hickory

• Newton

• Conover

• Claremont

• Maiden

• Long View

• Catawba

• Statesville

• Morganton

Yes. Johnston Truck Service provides DOT roadside emergency repairs to help get commercial trucks back into safe operating condition as quickly as possible. If your truck has been placed out of service or develops a safety issue on the road, our mobile tire technicians can respond promptly to diagnose and repair the problem.

We proudly serve Hickory, Catawba County, and surrounding areas with reliable mobile tire repair services.

If you experience a roadside breakdown or DOT safety issue, contact Johnston Truck Service for fast emergency assistance.

Yes. Johnston Truck Service sells new commercial truck tires for semi-trucks, delivery trucks, and diesel pickups. We offer a variety of high-quality tire brands and sizes to meet the specific needs of your vehicle and driving conditions.

Our team can help you select the right tires for steer, drive, and trailer axles, ensuring optimal performance, safety, and longevity. In addition to sales, we provide professional mounting, balancing, and installation services so your tires are ready for the road.

We proudly serve fleets, owner-operators, and individual truck owners throughout Hickory and surrounding areas with reliable commercial truck tire solutions.

Yes. Johnston Truck Service offers high-quality retread and recap tires for commercial trucks, semi-trucks, and diesel pickups. Retreading provides a cost-effective way to extend the life of your tires while maintaining safety and performance.

Our team carefully inspects tires before retreading to ensure they meet safety standards, and we use proven retread processes to deliver reliable, long-lasting results. Whether you need drive, or trailer tires, we can help you choose the best retread or recap solution for your fleet or individual vehicle.

We proudly provide retread and recap services throughout Hickory, Catawba County, and surrounding areas for fleets, owner-operators, and local truck owners.

Yes. Johnston Truck Service provides roadside tire repair services for commercial trucks, semi-trucks, and diesel pickups. Our mobile team can respond to tire emergencies on-site, including flat tires, blowouts, and tire damage, to get you back on the road quickly and safely.

We handle repairs for steer, drive, and trailer tires, and can also assist with temporary replacements or tire changes when needed. Our goal is to minimize downtime and ensure your truck is safe and road-ready.

We proudly offer roadside tire repair service throughout Hickory, Newton, Conover, Claremont, Statesville, Morganton, and surrounding areas.