I have a question about turbo boost while using cruise control. When accelerating not on cruise, my boost is up to about 8 lbs with occasional spikes up to about 12. This seems normal from what I've read. While cruising at speed, off cruise, I get boost of a few lbs and it varies by throttle. When on cruise, by boost Gradually drops to zero, or close to it, and the tranny is more likely to drop down a gear than to spike the boost. Is this normal? it never has boost problems except on cruise. I was wondering if this was some fuel saving measure built in by gm.