2001 GMC Sierra 2500 HD Q&A

2001 GMC Sierra 2500 HD Question: truck won't start or turn over

My truck will not start. I went out this morning and stuck my key in and it didn't do anything. I looked down and the gauges were dancing all over the place and I could hear the battery drawing juice, even without the key in the ignition. Does this mean that the computer board is going? Do I need a new ignition? I did disconnect the battery so it would quit drawing juice that I could hear thou. Please help!! -
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