Duramax Diesel Repair in Clackamas, OR

Expert Service for Chevy & GMC Duramax Trucks

Chevy and GMC trucks equipped with the Duramax diesel engine are built for strength and reliability. From early LB7 models to the latest L5P, these engines are favorites among truck owners who tow, haul, and drive hard. At Rob’s Automotive Repair Center in Clackamas, OR, we provide complete Duramax diesel repair and maintenance services to keep your GM truck performing at its best.

Duramax Generations We Service

We work on every Duramax generation, including:

• LB7 (2001–2004) – known for injector issues
• LLY (2004.5–2005) – common overheating concerns
• LBZ (2006–2007) – popular, reliable platform
• LMM (2007.5–2010) – DPF-equipped models
• LML (2011–2016) – CP4 fuel pump issues
• L5P (2017–present) – powerful, modern Duramax engines

From Silverado and Sierra HD trucks to Savana/Express vans, we handle it all.

Common Duramax Problems We Repair

Duramax engines are tough, but they’re not without weak points. We regularly fix:

• LB7 injector failures (fuel in oil, smoking, hard starts)
• LLY overheating & head gasket issues
• Turbocharger failures and boost leaks
• LML CP4 pump failures leading to fuel system damage
• DPF, DEF & NOx sensor issues in emissions-equipped models
• Electrical and injector harness faults

We understand Duramax-specific problems and apply proven repair solutions.

Duramax Maintenance Services

Proper care helps your Duramax last for hundreds of thousands of miles. We offer:

• Fuel filter replacements to protect injectors and pumps
• Cooling system flushes to prevent overheating
• Transmission service (especially Allison units paired with Duramax engines)
• Oil changes with the correct spec oil for durability
• Fleet service plans for business-use GM trucks

Preventive maintenance saves money and protects your investment.

Allison Transmission Service

Most Duramax trucks come paired with the legendary Allison transmission. Our technicians provide:

• Fluid & filter changes with Allison-approved fluids
• Diagnostics & repair for shifting, slipping, or overheating issues
• Driveline inspections (U-joints, differentials, transfer case)

We service both engine and transmission together to keep your truck reliable.

Why GM Truck Owners Trust Rob’s

• Duramax specialists with years of hands-on experience
• Advanced diagnostics for GM diesel platforms
• OEM-quality parts and reliable upgrades
• Quick turnaround to get work trucks back on the road
• 4-year/48,000-mile nationwide warranty on qualifying repairs

We combine Duramax expertise with the customer care you expect from a trusted local shop.

Serving Chevy & GMC Diesel Owners in Clackamas

Located in Clackamas, OR, we serve Duramax owners across the Portland metro, including Happy Valley, Oregon City, Damascus, and Milwaukie. If you’re searching for Duramax diesel repair near me, Rob’s Automotive Repair Center is your local expert.

Schedule Duramax Service Today

From injector replacements on an LB7 to DEF system repairs on a modern L5P, our team has you covered.
Call or schedule online today for professional Duramax repair in Clackamas, OR.

Call Us
(503) 650-6101

Business Addresss:
11955 SE Hwy 212, Clackamas, OR 97015

Business Hours:
Open Monday through Friday
from 7:00am – 6:00pm