1998 GMC Suburban Owner's Manual - Page 104

1. Hold the brake pedal down with your right foot and set the parking brake. 2. Move the shift lever into PARK (P) position like this: Move the lever up as far as it will go. 3. If you have four-wheel drive, be sure the transfer case is in a drive gear -- not in NEUTRAL (N). 4. Turn the ignition key to LOCK. 0 Pull the lever toward you. 5. Remove the key and take it with you. If you can leave your vehicle with the ignition key in your hand, your vehicle is in PARK (P). 2-26