I have a 77 Suburban and I went to turn the ignition to the OFF position after driving it and it won't budge. It will only go to the ON and START positions and the key can't be removed. I tried a electronic cleaner and a silicone lubricant in the key slot, the key switch barrel, the turn signal opening and the tilt steering opening. No luck.
Some observations: Before this happened the shift lever would sometimes have a little hangup going from park to reverse. Also I noticed the parking brake lamp stayed on the last two times I drove, and the parking brake was not set.
Any help would be greatly appreciated as this is my only ride. Thank You, Bob