Oldsmobile 2000 Silhouette - Manual (Page 323)

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The fuel filler door is located on the driver’s side of
the vehicle.
When the fuel door is opened on a vehicle with dual
sliding doors, the driver’s side sliding door will only
open partway.
While refueling, let the cap hang by the tether as shown.
To remove the cap, turn it slowly to the left
(counterclockwise). The cap has a spring in it; if you let
go of the cap too soon, it will spring back to the right.