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Diesel & Truck Repair Shops in San Marcos, CA

6 of the 82 auto repair shops we list in San Marcos have diesel engine or heavy truck repair.

Diesel engines and heavy trucks need different tools, parts and training than passenger cars, and many shops turn them away. Every shop here names diesel, semi, heavy-duty or commercial truck work in its business name, listing or on its own website — a shop that services “cars, trucks and SUVs” is not enough.

  1. Hybrid Auto Repair San Marcos

    375 S Rancho Santa Fe Rd, San Marcos, CA 92078

    Transmission repairDiesel & truckA/C repair
    Call Website Directions

  2. Caledonian Auto Repair

    763 W San Marcos Blvd, San Marcos, CA 92078-1232

    Transmission repairDiesel & truckA/C repair
    Call Website Directions

  3. V-Tec Auto Repair

    755 W San Marcos Blvd #105, San Marcos, CA 92078

    Transmission repairDiesel & truckA/C repair
    Call Website Directions

  4. Fast Automotive Center

    1288 W San Marcos Blvd, San Marcos, CA 92078-4075

    Smog & emissionsDiesel & truckEuropean & importA/C repair
    Call Website Directions

  5. Ready Line Fleet Service

    1322 Descanso Ave # A, San Marcos, CA 92069-1306

    Mobile mechanicDiesel & truckA/C repair
    Call Website Directions

  6. Paradise Auto and Truck Center

    San Marcos, CA

    Diesel & truck
    Call Directions
Say what you drive. A shop that works on diesel pickups (Duramax, Power Stroke, Cummins) is not always set up for semi trucks, and fleet shops may put contract customers first. If you run a commercial vehicle, ask whether they do DOT inspections.

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Diesel & Truck Repair Shops near San Marcos

Good to know

Do I need a diesel specialist for my pickup?

Most shops can handle routine maintenance, but fuel injection, turbochargers, diesel emissions systems (DPF, DEF, EGR) and engine repairs are best done by a shop that works on diesels every day.

Where can I get a DOT inspection?

Commercial truck shops and some diesel repair shops perform annual DOT inspections with a qualified inspector. Call ahead — not every truck shop offers them.