GMC 2008 Savana Van Owner's Manual page 65

Driver Side shown, Passenger Side similar
If your vehicle is a cargo or passenger van with
a sliding door and it has a roof-rail airbag for the
driver and right front passenger position, the roof-rail
airbags are in the ceiling above the side window.
Driver Side shown, Passenger Side similar
If your vehicle has roof-rail airbags for the driver,
right front passenger, passengers behind the driver
and right front passenger, and the third row outboard
passengers, the roof-rail airbags are in the ceiling
above the side windows. On the driver's side of the
vehicle, there is one single roof-rail airbag for either
vehicles with a hinged door or a sliding door.
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