2000 GMC Ignition switch

Hello, I am new to this forum, I need help with a question...Where is the ignition switch...the reason I ask , is that we took our 2000 in for warranty cuz it wouldn't shift, it would if you turn the key on and off a few times, that was 5 mths ago, they said they replaced the ignition switch, we haven't drove it much since and now we are getting a draw on the battery, the locks won't auto unlock and there is a major draw, I phoned the dealer and he said if it was them that installed wrong it will be warranty (now over warranty miles) but I asked if the ignition switch was in the ignition , like near the key and he said no, but wouldn't tell me where it was, something keeps clicking on drivers side compartment every time you pull battery cable off and on, can anyone tell me where the thing is???

usally on top on the stear comlum. have to dopm that to get to it. older GM that where is was.