2003 Chevrolet Venture Owner's Manual - Page 121

To unlock either front door from the outside with the key, insert the key and turn it toward the front of the vehicle. If your vehicle has power door locks, you can unlock all of the doors and the liftgate by inserting the key, turning it toward the front of the vehicle and holding it there for one second. To lock either front door from the outside with your key insert the key and turn it toward the rear of the vehicle. If your vehicle has power door locks, all of the doors will unlock when you insert the key and turn it toward the rear of the vehicle. From the inside, use the manual or power door locks. To unlock either front door from the inside, pull back on the manual lever. To lock either front door from the inside, push the manual lever forward. 2-10