02 gmc lb7 duramax won’t start

Welcome to Just Answer I'm Chris aka Moose, I'm sorry you are having problems with your LB7. I will do my best to help you get this resolved. If I happen to be helping another or step away during our communication, please know I will follow up as soon as I am back available/online. I try to be online for about 10+ hours a day, midday and late-night shift. - Does the [exhaust](/topics-exhaust-gmc/) smoke while cranking at full throttle? - Does the primer go soft after cranking? - Do you have a scan tool to see what the fuel rail pressure is while cranking?

no and no

Have you done a fuel system return flow test to see if the injectors or injector pump are returning to much fuel back to the fuel tank?

I got it fixed

Good job, any other concerns or close your question?

Another question sorry to bother you my truck runs at 29 lbs of boost I should be pushing 35-40lbs but but I can’t find the boost leak

If there is a boost leak in one of the cold air charge tubes or intercooler. The best way to find that is by plugging the hose to the intake and pack air and smoke into the opening in the air filter box. Then look for it escaping. If there is none then it has to be a concern with the turbo not making enough boost. Check for a restricted air filter or clogged exhaust. It can be the boost sensor is reading incorrectly. It can be worn or damaged compressor fins in the turbo. Thank you for visiting Just Answer, I hope I was able to answer your question. If you need to follow up on this concern please use the reply button. If you like my answer please reply so I can mark your question complete. Moose

Thank you buddy

Glad to help