Mine is an 08 Suburban, so it should be the same as Tahoe or Yukon. Driver side is down, Passenger side is up. I don't know for sure if they failed on deployment or on retracting, so I don't know if the failure was caused by the passenger side or the driver side. I've done the suggested procedure to reset them but nothing happens. With my problem does anyone know what the most likely culprit is and if it's driver side or passenger side causing it. Is it common for both to fail if one side only has a problem. What would I need to do to get them both down and leave them that way? Thanks for the help.