Originally Posted by George B

What was the cure for this issue? I have the same issue with new fuel pump and regulator already installed.

Originally Posted by nissan4x4

Hey new to forum great site by the way been a lurker for years,Anyways have a 2003 2500hd 6.0l with hard starting issue.I have replaced the fuel pump,filter and fuel pressure regulator with oem gm parts and still have hard start issue.It will start cold just like when it did new,but when warmed up wil turn over 4 or 5 seconds before starting. Im totally lost at what it might be any insight would be greatly appreciated.thanks Ty