One problem related to brake sensor has been reported for the 2009 Chevrolet Silverado. The most recently reported issues are listed below.
Driving down highway, check engine light pops up, tractions control indicator light, along with digital display saying several things. Such as, engine reduced power, service traction control soon. . . . . . . . . . Pulled over, had a very rough idle. Made it to parts store and have the truck scanned. Turns out it need the throttel positioning sensor needs replaced. Had them clear the code, drove few more miles and all happens again.