1998 GMC Sonoma Owner's Manual - Page 76

Ignition Positions Use the key to turn the ignition switch to five different positions. NOTICE: Don't operate accessories in the ACCESSORY position forlong periods of time. Prolonged operation of accessories in the ACCESSORY position could drain your battery and prevent you from starting your vehicle. LOCK (€3): This position locks your ignition, steering wheel and transmission. It's a theft-deterrent feature. You will only be able to remove your key when the ignition is turned to LOCK. OFF (C): This position lets you turn off the engine but still turn the steering wheel. Use OFF if you must have your vehicle in motion while the engine is off (for example, if your vehicle is being towed). RUN (D): This is the position for driving. A i E ACCESSORY (A):This position lets you use things like the radio and the windshield wipers when the engine is off. Push in the key and turn it toward you. Your steering wheel will remain locked, just as it was before you inserted the key. START (E): This position starts your engine. 2-12