Thankfully, when GM debuted the LLY Duramax in 2004, the engineering team had corrected the fuel injector issue altogether.

[Image by Joe Haupt via Flickr | Cropped and scaled | CC BY-SA 2.0] In mid-2004, Chevy followed up the LB7 with the LLY Duramax, which boasted a new injector design that made servicing much easier.