GMC Envoy XL, Envoy: Lights and Instruments

The hazard

On certain vehicles, vibration and heat may cause the tail lamp/stop lamp bulb to loosen in its socket. If this occurs, the bulb may flicker and eventually become inoperative. The loss of one or both of the tail lamps/stop lamps could reduce the vehicle's visibility to following drivers and fail to warn others that the vehicle is braking and/or is stopped, which could lead to a vehicle crash. Correction: Dealers will inspect the tail lamp/stop lamp assemblies and, if necessary, replace them.

What to do

Contact your dealer; the remedy details were not included in the filing.