Can I drive my 2011 gmc terrain with the stabili-trak not on?

Yes it can be driven have vehicle scanned for any trouble codes --be cautioned --stabili-trak is tied into abs and speed sensors and the transmission-engine -and can go into limp mode -this problem sometimes has been known to show up and clear itself ---check your hubs- abs wiring and sensors -speed sensors --check that debris didnt damage or disconnect any wires or connections also traverse would kick up stabilitrak problem with a fuel management problem
Electronic stability control Chevy Traverse Stabilitrak Traction Control problems