DURAMAX DIESEL

The later version of the fuel system did away with the FICM and utilized a CP4 injection pump. The Duramax Engine had some issues, but they extended the warranty on the injectors to 200,000 miles due to failures that were widespread, and there were a lot of diesel trucks in the shop to fix the issue. Changing the injectors on the LB7 Duramax Engines was time-consuming since they were located under the valve cover. The premature injector failure was actually a result of air bubbles in the fuel line. They accumulated in the CP3 pump so when the injector went to fire, the bubble would get between the injector plunger and the injector tip. came into contact with the injector tip. With the bubble there, the injector plunger had no fluid damping when it came into contact with the injector tip, causing a small gap to form over time. Once that gap grows large enough fuel is allowed to flow through continuously since the rail is pressurized so high. The computer system was unable to determine if this was happening, so the check engine light would not notify the driver. The only way to determine if this was happening was to measure the return fuel flow rate.

We keep up with issues like fuel flow rates and updates in the Duramax diesel engine so that we can provide quick diagnostics for you and answers quickly, which equals more efficient and cost-effective repairs, and our Duramax diesel truck drivers don't spend as much time in the shop as a result.  It is one way we are able to help our GMC and Chevy drivers trust their diesel trucks to the experts, one big issue fixed at a time!

The true secret to keeping your diesel truck driving like new longer and avoiding repair costs is proper maintenance and repairs done on time vs waiting for them. Our team of certified diesel technicians is well-qualified to fix or maintain anything, including your Duramax diesel warranty issues. We actually have diagnostic equipment as good as or better than the dealerships, and our team is cross-trained on many different kinds of diesel trucks, so you get the advantage of experience. Skip the dealer prices and enjoy the peace of mind you get from quality service, by contacting us today for all your diesel repair and maintenance needs. **Below you will see some of our services | Maintenance Schedule for Duramax Diesel Engines | Specs on the 6.6L V-8 L5P Turbo-Diesel.

Specialty services for Duramax diesel engines provided here include:

• Duramax injectors
• Duramax EGR coolers and valves
• Duramax CP3 injection pumps
• Oil coolers
• Head gasket replacement
• Head studs
• Turbo replacement
• Rebuilds
• Injectors
• High-pressure oil pumps
• Complete Engine Repair or Rebuild
• Complete Diesel Engine Replacement

Maintenance Schedule Suggested for your Duramax Diesel:

7,500 MILES DURAMAX MAINTENANCE

• Change engine oil and replace the oil filter
• Rotate Tires
• Inspect engine air filter minder, and replace filter as required

15,000 MILES DURAMAX MAINTENANCE

• Change engine oil and replace the oil filter
• Inspect tires for wear, measure tread depth, and rotate tires
• Inspect engine air filter minder and replace filter as req.
• Replace engine and frame-mounted fuel filters
• Inspect steering linkage, suspension, and if equipped, driveshaft and ball joints
• Inspect engine cooling system and hoses
• Inspect the brake system
• Inspect exhaust system and heat shields
• Check wheels for endplay and noise
• Inspect and lubricate 4x2 ball joints
• Inspect and lubricate steering idler arms

22,500 MILES DURAMAX MAINTENANCE

• Change engine oil and replace the oil filter
• Inspect engine air filter minder and replace filter as req.

30,000 MILES DURAMAX MAINTENANCE

• Change engine oil and replace the oil filter
• Inspect tires for wear, measure tread depth, and rotate tires
• Inspect engine air filter minder and replace filter as req.
• Replace engine and frame-mounted fuel filters
• Inspect steering linkage, suspension, and, if equipped, driveshaft and ball joints
• Inspect engine cooling system and hoses
• Inspect the brake system
• Inspect the exhaust system and heat shield
• Change the automatic transmission fluid and external filter element
• Check wheels for endplay and noise
• Inspect and lubricate 4x2 ball joints (except F-450 / F-550)
• Inspect and lubricate steering idler arms

37,500 MILES DURAMAX MAINTENANCE

• Change engine oil and replace the oil filter
• Inspect engine air filter minder and replace filter as req.

45,000 MILES DURAMAX MAINTENANCE

• Change engine oil and replace the oil filter
• Inspect tires for wear, measure tread depth, and rotate tires
• Inspect engine air filter minder, and replace filter as required
• Replace engine and frame-mounted fuel filters
• Inspect steering linkage, suspension, and, if equipped, driveshaft and ball joints
• Inspect engine cooling system and hoses
• Inspect the brake system
• Inspect exhaust system and heat shields
• Check wheels for endplay and noise
• Inspect and lubricate 4x2 ball joints (except F-450 / F-550)
• Inspect and lubricate steering idler arms

52,500 MILES DURAMAX MAINTENANCE

• Change engine oil and replace the oil filter
• Inspect engine air filter minder, and replace filter as required

60,000 MILES DURAMAX MAINTENANCE

• Change engine oil and replace the oil filter
• Inspect tires for wear, measure tread depth, and rotate tires
• Inspect engine air filter minder, and replace filter as required
• Replace engine and frame-mounted fuel filters
• Inspect steering linkage, suspension, and, if equipped, driveshaft and ball joints
• Inspect engine cooling system and hoses
• Inspect the brake system
• Inspect exhaust system and heat shields
• Change the automatic transmission fluid and external filter element
• Change the manual transmission fluid
• Check wheels for endplay and noise
• Lubricate 4x4 hub needle bearings
• Lubricate 4x2 wheel bearings
• Replace wheel bearing grease seal
• Inspect and lubricate 4x2 ball joints (except F-450 / F-550)
• Inspect and lubricate steering idler arms

Talk to our professionals today at Premier Diesel about scheduling your diesel engine maintenance today before you decide to replace your Duramax diesel vehicles if you have engine issues. We look forward to working with you to keep your diesel vehicles on the road.

*Image Information & Credits: 6.6L V-8 L5P Turbo-Diesel | 3450 rpm | 445 hp (322 kW) @ 2800 rpm* horsepower | 910 lb-ft (1234 Nm) @ 1600 rpm* torque | The New L5P Duramax 6.6L turbo-diesel engine advances the GM legacy of powerful, quiet, and durable diesels. The next-generation redesign offers more horsepower and torque for easier, more confident hauling and trailering. 19% increase in max torque over the previous Duramax 6.6L, it is quieter and smoother, reducing noise at idle by 38%.