Whether you are a hardcore Gmc/ Chevrolet fan or not, you can likely agree that the Duramax diesel engine combined with the Allison transmission is an amazing combination in a light truck. We have a Duramax diesel specialist on our team that is familiar with all the common failures and also has the diagnostic skills to find any hard to find concerns that may pop up.
The GM version of the 6.6L Duramax V8 was a combined effort between General Motors and Isuzu. Proudly here in the U.S. Ohio to be exact. The Duramax V8 in the Gmc and Chevrolet trucks was super impressive when it first debuted in the early 2000’s and has continually improved and progressed into the amazing product we have today. The 5p version in the newer trucks are now putting out an impressive 445 horsepower and 915 ft pounds of torque right off the showroom floor. Plus, we all know that with a few minor programming changes, this engine is capable of way more.
Here are some common things we are currently seeing in our shop:
- Fuel system problems- There are numerous codes that can pop up pertaining to the fuel system performance. Thankfully we don’t see many issues with the high pressure system but we are still seeing some injector failures. We have had numerous problems with aftermarket fuel filters. We strongly suggest always replacing the fuel filter with the original equipment filter to avoid any fuel system problems.
- DPFE/ Emissions- As our diesel engines keep providing more power but the emissions standards keep getting more strict, our new trucks come with a large amount of emissions control problems. It is not a question of if, but when you are going to have an emissions component fail. These can often be difficult to pinpoint but we know the emissions systems inside and out and can help you find the problem when it happens.
- TurboCharger- Although the Duramax V8 is equipped with a high quality Garrett turbocharger and a great intercooler, it is still susceptible to wear and tear. With the extreme amount of heat cycling that happens in the turbocharger and exhaust, it will eventually wear or fail. There are some services that can be done to extend the turbo life. The turbo charger is a variable-geometry vane, meaning it has numerous moving internal parts. The turbo internals need to stay clean and free of deposits to function properly.