LB7 · LLY · LBZ · LMM · LML · L5P
Duramax Diesel Repair
in Clackamas, OR.
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.
Why GM Truck Owners Trust Rob’s
Duramax Specialists
Years of hands-on experience across every Duramax generation — from the original LB7 to the modern L5P.
Advanced GM Diagnostics
Dealer-level scan tools and software for Duramax engines paired with Allison transmissions — no guesswork.
OEM-Quality Parts
Genuine GM and premium aftermarket parts, plus proven Duramax upgrades for towing, hauling, and reliability.
Quick Turnaround
Work trucks back on the road fast — most repairs completed same-day or next-business-day.
What we cover.
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: From Silverado and Sierra HD trucks to Savana/Express vans, we handle it all.
- 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
Common Duramax Problems We Repair
Duramax engines are tough, but they’re not without weak points. We regularly fix: We understand Duramax-specific problems and apply proven repair solutions.
- 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
Duramax Maintenance Services
Proper care helps your Duramax last for hundreds of thousands of miles. We offer: Preventive maintenance saves money and protects your investment.
- 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
Allison Transmission Service
Most Duramax trucks come paired with the legendary Allison transmission. Our technicians provide: We service both engine and transmission together to keep your truck reliable.
- Fluid & filter changes with Allison-approved fluids
- Diagnostics & repair for shifting, slipping, or overheating issues
- Driveline inspections (U-joints, differentials, transfer case)
READY WHEN YOU ARE