...yes, there is no boost gauge, neither mechanical nor digital on the dashboard display.
...the torque curve is perfectly "flat" between 1850-4900 rpm. Here's the SAE HP & torque graph from the
CruzeForumz.com. To my eyeballs it looks like they actually "run" on the boost between those two limits--probably to get the necessary HP out of such small displacement for such heavy (3200 lbs) car:
...and, notice how "flat" the torque curve
continues to be beyond 5500 rpm (after a slight drop)!