GMC man I didnt see you out there or I cant place your face with your truck dont remember seeing it out there.

Allen jsut doesnt like Magnacharger LOL

 

Yeah he is still playing with the butt turbos.

 

"Butt turbo" thats the first time I have heard an sts called that

 

If your running the stock air box check a make sure it’s positioned correctly
and that the Air intakes to the box aren't obstructed.

My 2001 Suburban with the Side mount did the same thing and it was the air box was shifted blocking 30% of the airway.

Since then I opened up my fender well area and the air box and have no boost problems anymore.

 

Yeah i have a whole in the back end of the air box big enough to put my face in, so its breathing, and the blower sounds insanely good, only thing i could think of is a leak or like yall said a bypass actuator not working right,

i had to work on sunday

 

Made 315hp and tq fell off the chart on allen's superflow, a few days later it made 413/453 on a dynojet (only pulling till 5200, shifts at 6200 - they were "afraid the driveshaft was going to break") - were still trying to figure out what was wrong with the superflow runs.

 

that is a little comforting, lol, my truck runs hard, but damn i didnt think it only made 30 hp over stock, and 2 psi,

 

Have you thought about moving the actuator by hand with the motor shut off and see if it moves freely and in it's full range of motion? The shaft should move 90 degrees I think. You may have to pull the vacume hose off to do this more easily? Just throwing out ideas.