1997 Chevrolet Blazer Owner's Manual - Page 67

Endgate Release To open a mechanical lock system from the outside, insert the key into the lock and turn i t counterclockwise to unlock the glass. The endgate and glass will automatically lock when shut. Reach inside the endgate to lift the handle and open the endgate. To open a power lock system from the outside, insert the key into the lock button and turn counterclockwise. All doors will unlock. You may also use the keyless entry system,or the power door locks, if you're vehicle is so equipped. When doors are unlocked, press the button to open the glass. 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