Diesel Repair in Aurora & Centennial, CO

Finding a shop that actually knows diesel engines can be a challenge. Most general auto repair shops either don't work on diesels at all or treat them like oversized gas engines. At Keller's Professional Auto & Diesel, diesel is in our name for a reason — we've been diagnosing and repairing diesel vehicles in the Aurora and Centennial area since 2001.

Whether you drive a diesel pickup for work, a diesel SUV for the family, or depend on a diesel fleet to keep your business running, our ASE-certified technicians have the training and equipment to service it properly.

Diesel Services We Offer

  • Diesel engine diagnostics and repair — computerized diagnostics specific to diesel systems
  • Fuel injection service — cleaning, repair, and replacement of diesel injectors
  • Turbocharger service — inspection, repair, and replacement
  • Glow plug replacement — essential for cold-start reliability in Colorado winters
  • Diesel exhaust system service — DPF cleaning, EGR valve service, DEF system maintenance
  • Diesel oil change — using the correct heavy-duty oils and filters your diesel requires
  • Cooling system service — diesel engines run hotter and require properly maintained cooling systems
  • Preventive maintenance — scheduled service to keep your diesel running at peak performance

Signs Your Diesel Vehicle Needs Service

Diesel engines are built tough, but they still give warning signs when something isn't right:

  • Hard starting or long cranking — especially in cold weather, could indicate glow plug or fuel system issues
  • Black, white, or blue exhaust smoke — each color points to a different problem
  • Loss of power or poor acceleration — often related to fuel injection or turbo issues
  • Rough idle or unusual vibration — can indicate injector problems or engine timing issues
  • Check engine light — diesel-specific codes require diesel-specific diagnostic tools
  • Increased fuel consumption — your diesel should be efficient; if it's not, something is off
  • DPF warning light — the diesel particulate filter may need regeneration or service

Why Choose Keller's for Diesel Repair?

  • Diesel expertise — it's in our name and it's a core part of what we do
  • ASE-certified technicians trained in diesel-specific diagnostics and repair
  • 5-year/50,000-mile warranty — we stand behind our diesel work
  • Proper equipment — diesel-rated diagnostic tools, not just gas-engine scanners
  • Family-owned since 2001 — consistent quality, not rotating franchise techs
  • BBB A+ rated — trusted by diesel owners across the Denver metro area

Common Diesel Vehicles We Service

Ford Power Stroke, Chevrolet/GMC Duramax, Ram Cummins, Jeep EcoDiesel, Volkswagen TDI, Mercedes-Benz BlueTEC, BMW diesel, and more. If it runs on diesel, bring it in.

Schedule Your Diesel Service

Whether it's routine maintenance or a repair you've been putting off, we'll take care of your diesel the right way.

Aurora Location 18385 E Girard Ave, Aurora, CO 80013 Phone: 303-343-9200

Centennial Location 5646 S Gibraltar Way, Centennial, CO 80015 Phone: 720-876-1111

Monday through Friday, 7:00 AM to 5:00 PM. Early bird key drop available. ilable. , CO 80015 Phone: 720-876-1111

Monday through Friday, 7:00 AM to 5:00 PM. Early bird key drop available.