San Antonio Diesel Mechanics

Keeping your big rig running strong is essential when your livelihood depends on it. At Santin Auto & Truck Repair Center, we provide complete semi truck and diesel repair services in San Antonio to help you stay on the road safely and efficiently. Our ASE-certified technicians are highly  experienced at diagnosing and repairing heavy-duty trucks of all makes and models. From routine maintenance to complex overhauls, we handle everything from engine rebuilds and transmission upgrades to tires, electrical, suspension, and even collision repairs. Whether you operate a single truck or manage a fleet, you can count on our team for quality work, honest communication, and quick turnaround times. Give our San Antonio diesel mechanics a call to learn more or to schedule semi truck repair at our full service facility.

Diesel Semi Truck Engine Repair & Overhaul

When your diesel engine isn’t running right, it can cost you time and money. Our technicians use advanced diagnostic tools to identify issues quickly and accurately, ensuring your 18-wheeler performs as designed. We service all major diesel engine brands and handle everything from oil and coolant leaks to injector replacements, turbocharger repairs, and EGR or DPF system maintenance. For engines showing signs of wear or loss of power, we also offer complete diesel engine rebuilds and overhauls to restore performance and reliability. Whether it’s preventive diesel maintenance or a major diesel engine repair, we’ll help keep your big rig running like new.

Semi Truck Transmission Repair & Upgrade

Gearing issues can take a truck off the road fast, but our team has the skill and equipment to fix transmission problems fast or upgrade your drivetrain the right way. We specialize in clutch and transmission repair for manual and automatic systems, and we are an Allison Transmission installer. From fluid changes and transmission leak repair to full transmission replacements, we are your source for expert semi truck transmission repair in San Antonio and throughout South Texas.

Semi Truck Suspension & Brake Repair

Your truck’s suspension and braking systems are critical for control, comfort, and safety. Santin Auto & Truck Repair Center specializes in comprehensive big rig brake repair and suspension services for all types of semi trucks and the trailers they pull. We replace worn shocks, air bags, and leaf springs, as well as repair air brake systems, and perform complete semi truck brake jobs in San Antonio. Our technicians also offer truck alignment and axle repair to reduce tire wear and improve fuel efficiency, helping you get the most out of every mile. Furthermore, we even offer semi truck tire sales and replacement at our facility.

Semi Truck Electrical & Hydraulics Repair

Modern trucks rely on complex electrical and hydraulic systems to power critical components. We’re equipped to handle everything from alternator and starter replacement to diagnosing lighting, wiring, and sensor issues. Our San Antonio hydraulic repair services cover custom hose fabrication, hydraulic cylinder rebuilds, and system troubleshooting for lift gates, dump beds, and other specialized equipment. Whether your truck won’t start or your hydraulics are leaking, Our San Antonio semi truck shop will get your system back in working order quickly and affordably.

Semi Truck Collision Repair

After an accident or collision, you can trust our San Antonio semi truck mechanics to restore your rig’s strength and appearance. Our team provides expert truck bodywork, welding, and fabrication for cabs, trailers, and chassis. We repair and replace lift gates, trailer doors, panels, and structural components using quality materials and precision workmanship. From minor dents and trailer skin issues to major frame damage, we’ll get your truck and trailer back in shape so you can get back to business.

When you need reliable semi truck and diesel repair in San Antonio, Santin Auto & Truck Repair Center is here to help. Our full-service semi truck repair shop in San Antonio is equipped to handle everything from routine maintenance to in-shop overhauls. You can call our local diesel techs at  210-890-5867 to schedule service or request a quote for your heavy-duty truck or trailer repair needs.