1997 GMC Sonoma Owner's Manual - Page 52

Door Locks I You can use your key to unlock your door from the outside. ,A 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 caneasily enter through an unlocked door when you slow down or stop your vehicle. so This may not be obvious: You increase the of chance of being thrown out the vehicle ina 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. h I I To lock your door from the inside, slidethe lever on your inside door rearward. -- -- To unlock the door from the inside, slide the lever on There are several ways to lock and unlock your vehicle. You can use the Keyless Entry System, if you have this option. 2-4