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Big-truck capability in a local shop — matching our Heavy Duty Repair Google listing.

Heavy-Duty Truck Repair

Our second Google Business Profile exists for one reason: heavy-duty work is its own discipline. Air brakes, air suspension, aftertreatment systems, wet-line hydraulics and commercial driveline components need tooling, bay space and experience that a car shop doesn't have.

We handle Class 6 through Class 8 trucks — straight trucks, dump trucks, day cabs and work chassis — with the same transparency as our light-duty work: measured diagnosis, photos, written estimates and no surprise totals.

Classes
Class 6 – Class 8
Systems
Air brakes / aftertreatment / driveline
Labor rate
$160/hr
Fleet accounts
Welcome

What's included

Scope of work

  • Air brake service: chambers, valves, slack adjusters and compressors
  • Air suspension, leveling valves and air-bag replacement
  • DPF, SCR, DEF and NOx aftertreatment diagnostics and repair
  • Clutch, flywheel and transmission service on heavy chassis
  • Differential, driveline, u-joint and carrier bearing work
  • Cooling system and radiator service for sustained-load duty
  • Electrical and charging-system repair on 12V commercial systems
  • DOT-style safety inspections and pre-trip write-ups

Symptoms we fix

Sound familiar?

  • Air pressure building slowly or purging constantly
  • Brake pull, long stopping distances or a dragging axle
  • Derate warnings, forced regens or DEF countdowns
  • Clutch slip, chatter or a high engagement point
  • Vibration at speed that changes under load
  • Sagging air suspension or leaning at rest
Describe it to us

How we work it

The four steps, every time

  1. 01

    Intake

    We log duty cycle — loaded weight, routes, idle hours — because heavy-duty faults are load-dependent.

  2. 02

    Diagnose

    Air-system pressure tests, aftertreatment data logs and chassis inspection with measurements.

  3. 03

    Repair

    Commercial-grade parts and documented torque on safety-critical fasteners.

  4. 04

    Road test

    Loaded road test where applicable, plus a post-repair data pull to confirm derates stay gone.

Heavy-Duty Truck Repair being performed at A&S Diesel in San Jacinto

Questions

Straight answers

Do you do roadside or mobile heavy-duty calls?

We focus on in-shop work where we have the tooling to do it right — tow to us and local towing is free with major repairs.

Can you clear a derate?

We fix the cause first, then clear and verify. Clearing a derate without the repair just buys miles until it returns.

Do you handle DOT inspections?

We perform inspection-style safety write-ups and can tell you exactly what a roadside inspection would flag.

Related terms

What people search for this job

heavy duty truck repair San Jacintodiesel mechanic heavy dutyair brake repairDPF repair HemetClass 8 truck repairaftertreatment diagnostics

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Free estimates · Free local towing with major repairs

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Tell us what it's doing. We'll tell you what it takes — in writing, before any work starts.