One problem related to service engine light on has been reported for the 2005 GMC Envoy. The most recently reported issues are listed below.
Service engine light illuminates and fuel levels are not properly indicated. The car shakes and cuts off when idling. Service engine light and low fuel illuminate continuously. Took car in twice to carl black kennesaw but they could not find anything wrong. I informed them on both service visits that I received a letter from GMC but they said my car was out of warranty.