2000 GMC Jimmy Owner's Manual - Page 78

When the doors are unlocked, press the button to open the glass. Reach inside the endgate to lift the handle and open the endgate. The endgate can be opened without a key if the driver's door is unlocked. The endgate glass will not release if the vehicle is in gear. To lock a power lock system from the outside, insert the key into the lock button and turn clockwise. All doors will lock. 2-10