Every time i get into it are climb a hill i get this lound suction noise and the only time it does
it is when the turbo is building boost any suggestions why this happens, are how to fix
it.

 

can you give us any more info??

 

Sounds like you might have a boost leak. It might sound like a suction noise, but it's probably a pressure noise. The most common for this leakage on LB7's is on the dr boost tube, down low by the gear box. The ps hose that goes to the gear box will rub on the boost tube and create a hole. You can patch it with JB Weld, then add some padding so it won't happen again. I'll try to find some pictures of when I've done a few here at work.

 

Thanks for the info, i will look at it and find out. Also i am not building the boost i should be building.

 

that would definitely verify a boost leak

 

yes you have a boost leak somewhere

 

You can read this thread to get a better idea of where to look: Thanks Diesel Place!!! - Diesel Place

 

Thanks for the help. My truck is running good once agian.