2006 Lexus GS 300 Owners Manual - Page 780

EXTERIOR EQUIPMENT G15016 G15015 2. To remove the fuel tank cap, turn the cap slowly counterclockwise by 90 degrees (to the pressure point 1 , then turn it additional 30 degrees (to point 2 ). Pause slightly before removing it. It is not unusual to hear a slight swoosh when the cap is opened. 3. The removed cap can be stored on the back side of the fuel filler door. Position the cap so that the hooks point to the left and right, and set it in the receptacle on the back side of the door. When installing the cap, turn the cap clockwise until you hear a click. When you hear the click, the cap is fully closed. If the cap is not installed securely, the malfunction indicator lamp comes on. Make sure the cap is tightened securely. The indicator lamp goes off after driving several times. If the indicator lamp does not go off, contact your Lexus dealer as soon as possible. 134