From the legendary LB7 to the modern L5P…our team handles the most common Duramax diesel repairs, including injector issues, fuel system problems, CP4 pump failures, turbocharger concerns, EGR and emissions system faults, DEF and DPF problems, cooling system repairs, glow plug diagnostics, and Allison transmission service to name a few. Whether your Duramax is losing power, smoking, leaking coolant, going into limp mode, or showing a check engine light, Arizona’s Affordable Diesel Tech has the tools and experience to diagnose it right and get your truck back on the road.
The original. Most commonly known for fuel injector failures and injector-related drivability issues.
Commonly associated with overheating concerns, turbo inlet restrictions, and injector harness issues.
The cult favorite. One of the most reliable Duramax engines, with common repairs including water pump leaks, glow plugs, and normal high-mileage fuel system issues.
Commonly known for emissions system issues, including EGR, DPF, regeneration, and sensor-related faults.
Commonly associated with CP4 high-pressure fuel pump failures, DEF system issues, and emissions-related repairs.
Common repairs include NOx sensors, DEF and emissions system faults, fuel system concerns, and turbo or cooling system issues.
Duramax fuel system failures can lead to hard starts, rough running, loss of power, fuel contamination, injector problems, and costly damage if ignored. Our team diagnoses and repairs Duramax fuel system issues to help protect your engine and keep your truck running strong.
Here are a few of the symptoms we hear about most often:
Yes. And we encourage you to ensure your vehicle is serviced at the proper interval. New transmissions are not cheap!
Typically, yes. If one fails the others are typically close behind. Doing all eight at once saves you money in the long run. It is a labor intensive repair that you don’t want to pay for each time an injector begins to fail. We will give you an honest recommendation based on your scenario.
A CP3 conversion is one of the most common reliability upgrades to consider because the factory CP4 injection pump has a reputation for costly failure. When a CP4 fails, it can send metal through the fuel system and damage the injectors, rails, and lines, turning one failed pump into a major repair.
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