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Re: Blazer 97 battery drainage
First, I would recheck the battery condition and take a close look at the cables for signs of corrosion.
Also check the positive feed to the underhood fuse box.
Have your battery checked with a digital battery tester (midtronics works well)
With your comment about the transmission not working, has the SES light come on?
The transmission shift control circuits are powered by the ignition switch (which has been known to cause some problems)
But check the battery and charging system first...low voltage problems play hell with the computer
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