I am new to the duramax scene, and I was just wondering if aftermarket performance injectors would solve the factory injector problems? I tried doing a search, but it timed out every time.

Nope, the only thing aftermarket about them is the nozzle, they are usually just honed out. I think there are some new ones being made that are bigger, but still just nozzles.

Will GM still replace injectors if a performance box is on the truck or do they void the warranty.

Will GM still replace injectors if a performance box is on the truck or do they void the warranty.


Yes It seems to vary depending upon the dealer.

Out of sight, out of mind. Remember that and you shouldn't have problems.