2003 GMC Yukon Owner's Manual - Page 107

Liftgate Glass and Liftgate To open a mechanical lock system from the outside, insert the key into the lock and turn it counterclockwise to unlock the glass and liftgate. The liftgate glass can be opened using the button on the liftgate after the doors have been unlocked. This can be done by using either the power door locks or the remote keyless entry system. To open the entire liftgate, lift the handle located in the center of the door. To lock a power lock system from the outside, insert the key into the lock button and turn clockwise. All doors will lock. You may also use the keyless entry system or the power door locks to lock the liftgate and liftgate glass. To open the passenger's side panel door, pull on the handle and pull the door open. To open the driver's side panel door, first open the passenger's side door. Then, pull the handle on the left door edge out and pull the door open. To close the doors, close the driver's side door first. After securely closing the door, close the passenger's side door. Make sure both doors are latched securely. To lock the rear doors from outside the vehicle, put your key in the lock and turn it clockwise. If you have power door locks, you can lock the side doors as well as the rear doors from inside the vehicle. For more information, see Power Door Locks on page 2-8 earlier in this section. Panel Doors To open the rear panel doors, you must open the passenger's side panel door first. If the door is locked, insert your door key in the lock and turn it counterclockwise to unlock it. 2-13