Hello, I too have a 1999 Grand Prix GT and it has started to unlock itself randomly. Both doors will unlock and the interior lights come on. I have found that by hitting lock once on key FOB. Lights will stay off. when Care not running. Though when car is running and driving relay continues to unlock doors. Has anyone found resolved this issue. I have pulled fuse for door locks stopping actuators from burning up up. Though relay still engaing.