American Truck & Trailer Repair Inc.

Heavy-Duty Truck Repair in Stockton, CA

American Truck & Trailer Repair Inc. provides heavy-duty truck repair in Stockton, California for semi-trucks, box trucks, dump trucks, buses, and commercial diesel fleets. Our technicians handle engine, drivetrain, brake, electrical, and aftertreatment work at our shop at 2969 Loomis Rd — and through mobile service when you can't come to us.

Call (209) 663-6000Request Service

What We Do

Complete heavy-duty diesel repair for semi-trucks, trailers, and commercial fleets in Stockton — engine to chassis, diagnostics to DOT compliance.

  • Diesel engines & aftertreatment — DPF, EGR, DEF/SCR, turbochargers, tuning and calibration
  • Drivetrain, transmissions, differentials, drivelines and clutches
  • Air and hydraulic brakes, ABS, and heavy-duty suspension
  • Diagnostics & electrical — fault codes, charging/starting, sensors and modules
  • DOT & BIT inspections and CARB Clean Truck Check support
  • Preventive maintenance (PM) — oil, filters, fluids, tires, and multi-point inspections

Trucks & Engines We Work On

We service the major heavy-duty makes and diesel engines running the Central Valley.

  • Freightliner, Peterbilt, Kenworth, Volvo, Mack, International, Western Star
  • Detroit DD13 / DD15 / DD16
  • Cummins ISX / X15
  • PACCAR MX-13
  • Volvo D13

Common Problems We See

  • Loss of power, poor fuel economy, or derates
  • DPF regeneration failures and aftertreatment warning lights
  • DEF/SCR system errors and sensor faults
  • Air brake leaks, slow application, or worn shoes and drums
  • Transmission slipping, hard shifts, or differential noise
  • Check-engine lights, no-starts, and charging failures

Our Process

  • 1Call (209) 663-6000 or request service online and tell us the symptoms.
  • 2We diagnose with the right scan tools to pinpoint the root cause.
  • 3You get a clear estimate before we start — no surprises.
  • 4We complete the repair with quality parts and document the work.
  • 5We keep records so future PM and compliance stay on schedule.

Fleet & Commercial Accounts

Run more than one truck? We set up fleet accounts with scheduled preventive maintenance, priority repair, and detailed service records. See our Stockton fleet maintenance page, or call us to build a plan around your routes and uptime targets.

We do NOT work on light-duty vehicles or gas engines.

Frequently Asked Questions

What kinds of trucks do you repair?
We work exclusively on heavy-duty diesel vehicles — semi-trucks and tractors, box trucks, dump trucks, trailers, and commercial diesel fleets. We do not service light-duty vehicles or gas engines.
Do you do both engine and chassis work?
Yes. We handle diesel engines and aftertreatment, drivetrain and transmissions, differentials, air and hydraulic brakes, suspension, electrical, and DOT inspections.
Can you get me back on the road quickly?
Downtime costs money, so we diagnose accurately the first time, chase parts down fast, and keep you updated. Call (209) 663-6000 and we'll let you know realistic timing for your repair.
Where is your shop?
We're at 2969 Loomis Rd in Stockton, CA 95205, with easy in-and-out access for heavy-duty trucks. We also offer mobile service when your truck can't reach the shop.

Get Your Truck Back on the Road

Call American Truck & Trailer Repair Inc. in Stockton, CA for fast, reliable heavy-duty service.

Call (209) 663-6000Request Diesel Repair