GMC 2000 Safari Owner's Manual page 101

1. Hold the brake pedal down with your right foot and
set the parking brake.
2. Move the shift lever into PARK (P) like this:
D
Pull the lever toward you.
2-26
D
Move the lever up as far as it will go.
3. Turn the ignition key to LOCK.
4. Remove the key and take it with you. If you can
remove the key from your ignition, your vehicle is in
PARK (P).