Transmission Gear Slipping problems of the 2007 GMC Envoy

The contact owns a 2007 GMC Envoy. The contact stated that while driving various speeds, the tire pressure and air bag warning indicator illuminated continuously. The engine was leaking oil and all four tire pressure sensors failed. The failure recurred numerous times and the vehicle was taken to the dealer multiple times for repair. There were several repairs made to the vehicle including the replacement of the transmission slip yoke however, the failure persisted. The manufacturer was not notified of the defects. The approximate failure mileage was unavailable.