I have a 2003 GMC 2500HD with the Duramax. I had injectors replaced at 70K under warrenty. They are under warrenty till 200K and I have 195K on the truck. It would appear that I have a fuel leak at one of my injectors. It is the rear cylinder on the drivers side. Diesel fuel is on the motor comming from that area. Fuel lines appear to be ok and dry (also located in this general area). Is this somthing that can possibly be fixed without pulling the injector? That looks pretty hard. The hex fitting where the fuel line enters the injector, can anyone tell me about that? Can the keeper be removed and the fitting tightened? Or are there O-Rings in there? Based on the fact that there is a keeper on the hex fitting I assume it does not get too much torque when installed. Any help is appreciated. I could try the dealer and see it this would be part of the warrenty coverage but I really dought it.
Michaelj-3rd@comcast.net

Thanks

 

the injector line can be tightened but if it was leaking it would likely be going under the valve cover.

the supply and return fuel lines connect right where you described. possibly them?

also i thought that the warranty was 7 year/200k mile what ever comes first so it would have ran out in 2010