Lexus GS350 Owner's Manual page 490

488
7-2. Steps to take in an emergency
Emergency repair method
Remove the valve cap from the valve
1
of the punctured tire.
Remove the air release cap from the
2
hose.
You will use the air release cap again.
Therefore keep it in a safe place.
GS350_300_GS F_OM_OM30G34U_(U)