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Diesel & Truck Repair Shops in Longmont, CO

7 of the 87 auto repair shops we list in Longmont 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. Del Camino Service Plaza and Truck Wash

    10763 Turner Blvd, Longmont, CO 80504

    Mon–Sat 7am–7pm

    Diesel & truck
    Call Website Directions

  2. Bowen Street Garage

    51 Bowen St, Longmont, CO 80501

    Mon–Fri 8am–5pm

    Transmission repairDiesel & truckA/C repairLoaner or shuttle
    Call Website Directions

  3. Steve's Automotive

    510 2nd Ave, Longmont, CO 80501

    Transmission repairDiesel & truckMuffler & exhaustA/C repair
    Call Website Directions

  4. Hayes Automotive

    190 S Main St, Longmont, CO 80501

    Diesel & truckA/C repairFinancing
    Call Website Directions

  5. Zach's Transmission and 4x4

    31 Price Rd, Longmont, CO 80501

    Transmission repairDiesel & truckLoaner or shuttle
    Call Website Directions

  6. McKay’s Garage

    3600 Stagecoach Rd N Unit B, Longmont, CO 80504

    Transmission repairDiesel & truck
    Call Website Directions

  7. Als Front Range Diesel Emissions

    1115 Bowen Cir, Longmont, CO 80501-6152

    Smog & emissionsState inspectionDiesel & 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 Longmont

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.