Two issues: 1) Vehicle indicates to service safety restraint system yet Onstar diagnostic monthly report says system is fine. The service restraint system notice intermittently gs on and off while driving frequently. Unable to confirm if air bag systems are active while driving. 2) Vehicle was being driven in fast lane around 70 mph and experienced immediate loss of acceleration power while trying to pass semi-tractor. Onboard alert indicates reduced acceleration drive with care. Error code says something is wrong with the coolant control valve. Some servicers indicate they have a backlog of over 1+ month before can diagnose.