On my 2003 Chevy Avalanche 1500 4x4 which I purchased a few months ago the key at times has a hard time turning the ignition switch on to start and at times when I go to shut down the key will turn far enough to shut the motor but the battery symbol is still lit on the dash and I can not remove the key--I restart a couple of times and finally it shuts down and I can remove the key. At times it works flawlessly. Would a new ignition switch be in order or is there something inside the steering column that could be causing the problem.