Hey, yes I will be calling customer service when they are open, just figured I'd also put the information into the public realm, since the answer to the following question was not.

I purchased a 2010 Sierra Denali earlier this year. I am impressed with the power the truck has, feels very fast. My ...

take off the pressure box, put the predator on extreme RKL puffer toon,
back out of drive way.
laugh wickedly.
realize you dont need puck. sell on diablo forums!

Hey Robert dont worry you'll get a lot more than 35 psi lol but kw5.9 is on the right track.
Factory boost levels from 04.5 and up go as high as 35 psi, 43+ on RKL with enough load.
Your air filter is dirty, or there is a leak somewhere after the turbo in the intake piping before the intake horn ...

yeah don't rely on the overhead except to fake it to your buddy's with chevy's lol...

the over head is way off because it doesn't see all of the extra fuel that the predator is adding. best milage is in extreme by the way, all of the added timing nets me 18.5 mpg towing a trailer 50 %, and that is ...

i would reinstall bully dog and run rkl stacker tunes with no timing added.
play around to see what makes the best power and remember that the higher the settings doesnt always equate to more performance.

the boost fooler for your truck - since mechanical wastegate - is just an $8 brass fitting ...

update

have tunes loaded onto predator and WOW these are some crazy tunes.
thank you Johan for giving me something so awesome to play with, i will treat it with the respect it deserves, lol

I just downloaded the proper tune file for my calid, uploaded to predator i still have regular tunes - tow, perf ...

Wow i feel for Johan taking abusive post after abusive post from ignorant whiners who know nothing about what they are asking yet insist it must be done as if they have done it a thousand times over.... whew!!

The over head computer : there is NO way for the overhead computer to read proper milage ...