Replaced so far with fairly decent evidence of requirement: Cam position sensor, MAF sensor (that was missing, i had to buy it), MAP sensor, & the crank position sensor. Now I have a p2261 code that does not show in global connect SI. I did find a GM Link article explaining it though. All 3 scanners I have read and describe the code as a supercharger bypass valve-mechanical. I go through the entire SI book and it leads me the final step of "Repair the boost source hose or the port for a restriction or blockage." Well at the boost source hose port, I have BOOST, like maybe 3-5in hg! Now a little higher RPM's and get a little vacuum, but maybe only 13in hg. Any help? Or am I just destined to wait till Sunday when Jim comes over?

Am I reversing my open and closed thinking with the actuator or what?
I feel retarded.

All I wanna do is get it to a tunable condition and go Trifecta, or some other virtual tuner I find.

It''s HP Tuned now, but I have never seen my fuel / boost maps my self.

 

The bypass valve itself could be frozen...happens with those. Lubricate it and see what it does

 

The actuator moves plenty with less than 13in hg vacuum applied.