1996 GMC Sonoma Owner's Manual - Page 51

Door Locks You can use the Keyless'Entry System, if you have this option. You can use your key to unlock your door from the outside. I -Unlocked doors canbe dangerous. Passengers especially children can easily open the doors and fall out. Whendoor is a locked, the inside handle won't open it. Outsiders caneasily enter through an unlocked door whenyou slow down or stop yourvehicle. This may not be obvious: You increase the so of chance of being thrown out the vehicle in a crash if the doors aren't locked. Wear safety belts properly, lock your doors, and will be far you better off whenever you drive yourvehicle. -- -- To lock your door from the inside, slide the lever on your inside door rearward. -~ There are several ways to lock and unlock your vehicle. To unlock the door from the inside, slide the lever on your inside door forward. You will see a red area on the lever. 2-3