Oldsmobile bravada 1996 Owner's Manual page 60

Reach inside the endgate
to lift the handle and
open the endgate.
The endgate and glass will automatically lock
when shut.
To lock the power lock systern from the outside, insert
the key in the lock button and turn it clockwise. All
doors will lock.
Remote Endgate Release
This button on the
driver's side of the
steering column allows
you to release the endgate
from inside the vehicle.
Your shift lever must be in PARK (P) or NEUTRAL (N)
for the release to work.