Chevrolet 1994 Blazer Owner's Manual page 241

Filling 'Your Tank
The fuel cap is behind
a hinged door on the
left side of your
vehicle.
To take off the cap, turn it slowly to the left.
Be careful not to spill gasoline. Clean gasoline from painted surfaces as
soon as possible. See "Cleaning the Outside of Your Vehicle" in the Index.
When you put the cap back on, turn it to the right until you hear a clicking
noise.
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