1993 Buick Regal Owner's Manual - Page 68

Ignition Key Positions I ACCESSORY This lock gives you five different positions. Before you put the key in, your ignition will be in the Lock position. This position locks your ignition, steering wheel and transaxle. It's a theft deterrent feature. The other positions let you perform these functions: ACC: Accessory lets you use things like the radio and the windshield wipers when the engine is off. To get into "Acc", push in the key and turn it toward you. Your 66