1996 GMC Sonoma Owner's Manual - Page 58

Key Release Button To remove the key on manual transmission vehicles, turn the key to the OFF position. Then turn the key to the LOCK position while pressing the key release button down at the same time. Pull the key straight out. Automatic transmission Move your shift lever to PARK (P) or NEUTRAL (N). Your engine won't start in any other position -- that's a safety feature. To restart when you're already moving, use NEUTRAL (N) only. I NOTICE: Don't try toshift to PARK (P) if your vehicle is moving. If you do, you could damage the transmission. Shift to PARK (P) only when your vehicle is stopped. Starting Your Engine Engines start differently. The 8th digit of your Vehicle Identification Number (VIN) shows the code letter or number for your engine. You will find the VIN at the top left of your instrument panel. (See "Vehicle Identification Number" in the Index.) Follow the proper steps to start the engine. 2-10