just got my first duramax its a 03 crew cab with 220000 miles love the torque :D just have one problem it smokes lightly when i stop but while driving no smoke at all i been reading around the forums and i see that it could be my injectors.. how can i tell which injectors is bad or do i replace all of them if anybody can help thanks:o:

You can have someone check the balance rates and return rates with a tech2 scanner or EFI Live. Search "LB7 injectors" you should get alot of info.

thanks bud

No problem