1999 Oldsmobile Cutlass Owner's Manual - Page 62
1999 Oldsmobile Cutlass Manual
Page 62 highlights
yellowblue Door Locks CAUTION: Unlocked doors can be dangerous. Passengers -- especially children -- can easily open the doors and fall out. When a door is locked, the inside handle won't open it. Outsiders can easily enter through an unlocked door when you slow down or stop your vehicle. This may not be so obvious: You increase the chance of being thrown out of the vehicle in a crash if the doors aren't locked. Wear safety belts properly, lock your doors, and you will be far better off whenever you drive your vehicle. There are several ways to lock and unlock your vehicle. From the outside, use your key or remote lock control transmitter, if your vehicle is equipped with it. From the inside, to lock the door, move the locking lever forward. To unlock the door, move the locking lever rearward. 2-4