I have an 07 GMC Duramax . It has an edge with attitude programmer,exhaust and air raid filter. The high boost limit buzzer on the programmer comes on with normal driving. Showing 35 psi. Could it be a wastegate issue? Thanks for any help.

 

Whats teh buzzer set at? by normal driving what do you mean? Is this while getting up to speed or just crusing at 65?

 

The only duramax with a wastegate is the first gen LB7 from then on out it's the VVT turbos. Also if your hitting 35psi, That's not good..if it's like all the other VVT on the earlier dmaxs your over speeding it.. most times 32-33psi is all you wanna see coming from a stock turbo. also I don't know why the edge is boosting so high...but keep in mind this is newer technology then my truck so this could be normal, I hope someone with a new model truck will chime in and help your more so then I can.

 

It's not normal with a edge juice only...Might try checking grounds and sending the box off to have it went through. What about the EGR and PCV system gunking up the turbo vanes and not allowing it to open? I've heard it happening more and more. I just got setup with a guy who makes the PCV delete kits.

 

i hit 32-33psi all the time, but not sure if i'v ever seen 35.