Diesel Duramax Diesel, Chevrolet & GMC


All Services

Duramax Diesel Repair Mechanics

We know operating a diesel-powered vehicle is more complicated than operating a gas-powered vehicle. Whether you’re using diesel for fuel efficiency, power, or reliability, the way you maintain your vehicle will determine the type of services it’ll require.

We’ve seen it all when it comes to Duramax diesel engines – our team of ASE Certified automotive repair specialists developed a list of common Duramax service issues* they’ve seen come through our shop over the years.

We are your one stop Duramax diesel repair shop servicing the Arvada metro area. Our loyal customers will tell you our team takes care of you at Colchin Automotive from the minute you call us until long after you drive your vehicle out of our garage. We guarantee it!

• Check Engine light
• Coolant leak
• Diesel Exhaust Fluid (DEF) system or tank
• Diesel Exhaust Fluid (DEF) tank problems (Urea levels)
• Diesel Particulate Filter (DPF)
• exhaust aftertreatment system
• Exhaust Gas Recirculation (EGR) cooler
• Exhaust Gas Recirculation (EGR) system
• Exhaust Gas Temperature (EGT) sensor
• exhaust smoke, soot, hazing
• Fuel Filter replacement
• Fuel Injector failure (LB7)
• Fuel Pressure Regulator
• High-pressure fuel pump (Bosch CP3 and CP4)
• Intake Air Temperature (IAT) sensor
• Mass Air Flow (MAF) sensor
• Radiator
• Reduced power (derate mode)
• Turbocharger failure
• Water Pump failure
• Wire harness chaffing
*Over the last 20 years, GM has built many generations of the Duramax. As such, it’s important to note some issues are unique to only one or two iterations.

Schedule Duramax Diesel, Chevrolet & GMC Service

Certifications & Memberships

We take pride in our certifications and adherence to the code of ethics for the Automotive Service Association (ASA), and The National Institute for Automotive Service Excellence (ASE). We believe in transparent reviews and ratings through our membership with the Better Business Bureau (BBB). We are also certified with Ask Patty.

Automotive Service Association (ASA) for auto shops
The National Institute for Automotive Service Excellence (ASE) for auto shops
Better Business Bureau (BBB) for consumer confidence
Ask Patty for Female-Friendly auto shop certification