Heavy Truck Diesel Repair in Concord, NC

CTR performs the full range of heavy duty diesel repair services for Class 6 through Class 8 trucks, including engine diagnostics, fuel system repair, injector service, turbocharger repair, electrical diagnostics, cooling system service, transmission and clutch repair, drivetrain work, and emissions system (DPF/DEF/EGR) service. We also offer preventive maintenance programs for fleets of all sizes.

Our technicians are experienced with all major commercial diesel engines, including Cummins (ISX, ISB, ISL, X15, B6.7), Detroit Diesel (DD13, DD15, DD16, Series 60), Caterpillar (C12, C13, C15), PACCAR (MX-13, MX-11), and International/Navistar platforms. We work on Kenworth, Peterbilt, Freightliner, International, Volvo, Mack, and Western Star trucks.

Turnaround time depends on the repair. Routine services like oil changes and filter replacements can often be completed same-day. Diagnostic work and mid-level repairs such as injector replacement or turbo service typically take 1–3 days. Major engine or transmission work may require 3–7 business days depending on parts availability. We communicate timelines upfront and keep you updated throughout the process.

Yes. CTR offers structured preventive maintenance (PM) programs designed around your fleet’s size, duty cycle, and OEM-recommended service intervals. Fleet accounts receive priority scheduling, consolidated invoicing, and detailed digital service histories for every unit. Contact us at 704-786-0132 to discuss a custom PM program for your fleet.

Diesel repair costs vary significantly based on the type and severity of the repair. A standard PM service may start in the hundreds, while major engine work can run into the thousands. CTR provides a detailed diagnosis and transparent estimate before any work begins — you’ll always know the cost before we proceed. We don’t charge diagnostic fees that disappear if you approve the repair.

Common causes of diesel engine overheating include low coolant levels, failed thermostats, water pump failure, clogged or damaged radiators, failed charge air coolers, head gasket leaks, and restricted airflow to the radiator. Overheating should be addressed immediately — continued operation can cause warped heads, cracked blocks, and engine failure. CTR performs full cooling system diagnostics to identify and fix the root cause.

Absolutely. CTR uses OEM-level diagnostic scan tools and software to read and interpret fault codes from your truck’s ECM (engine control module). We go beyond just reading codes — we perform root-cause analysis including sensor testing, performance data review, and component inspection to ensure we fix the underlying problem, not just clear the code.

Yes. We service the full diesel aftertreatment system, including DPF (Diesel Particulate Filter) cleaning and replacement, DEF (Diesel Exhaust Fluid) system diagnostics and repair, EGR (Exhaust Gas Recirculation) valve and cooler service, and SCR (Selective Catalytic Reduction) system inspection. Properly functioning emissions components are essential for passing inspections, maintaining engine performance, and avoiding costly derate conditions.

CTR’s heavy-duty diesel repair shop is located at 2931 Armentrout Drive, Concord, NC 28025 — just off I-85 at Exit 58. We’re open Monday through Friday, 7:00 AM to 5:00 PM. We serve the entire Charlotte metro area including Concord, Kannapolis, Harrisburg, Charlotte, Huntersville, Mooresville, Salisbury, and surrounding communities.

Mobile repair works well for simple roadside issues, but complex diesel work — engine diagnostics, injector calibration, transmission repair, turbo rebuilds — requires a fully equipped shop environment with heavy-duty lifts, OEM-level diagnostic tools, and controlled conditions. CTR’s in-shop approach means more accurate diagnosis, higher-quality repairs, and longer-lasting results. We’ve been doing this since 1995 because our customers value getting it done right the first time.