Chevrolet 1998 C/K Full-Size Pickup Owner's Manual page 116

Locking Rear Axle (If Equipped)
If you have this feature, your locking rear axle can give
you
additional traction on snow, mud, ice, sand or
gravel. It works like a standard axle most of the time,
but when one of the rear wheels has no traction and the
other does, this feature will allow the wheel with
traction to move the vehicle.
Windows
Manual Windows
Power Windows (If Equipped)
Turn the hand crank on each door to raise or lower
manual windows.
Regular and Extended Cab
2-32