2004 GMC Canyon Owner's Manual - Page 97

Ignition Positions With the key in the ignition switch, you can turn to four different positions. LOCK (A): This position locks your steering wheel, ignition and transmission on automatic transmission vehicles. If your vehicle has a manual transmission, this position locks your steering wheel. It is a theft-deterrent feature. You will only be able to remove your key when the ignition is turned to LOCK. If you have an automatic transmission, the ignition switch cannot be turned to LOCK unless the shift lever is in PARK (P). Notice: Using a tool to force the key from the ignition switch could cause damage or break the key. Use the correct key and turn the key only with your hand. Make sure the key is all the way in. If it is, turn the steering wheel left and right while you turn the key hard. If none of this works, then your vehicle needs service. ACC (ACCESSORY) (B): This is the position in which you can operate your electrical accessories or items plugged into the accessory power outlets. It also unlocks the steering wheel and ignition. Use this position if your vehicle must be pushed or towed. {CAUTION: On manual transmission vehicles, turning the key to LOCK will lock the steering column and result in a loss of ability to steer the vehicle. This could cause a collision. If you need to turn the engine off while the vehicle is moving, turn the key only to ACC. Do not push the key in while the vehicle is moving. 2-17