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I have the same problem with a 1997 Chevy Van. The problem seems to be that GM states that a 50 milliamp draw will kill the battery, and that the alarm system is < 50 milliamp, but I can find out how much less.

I have killed several batteries because of this.

Now the trick is to put in a new battery.

When you connect a new battery, the alarm goes off.

To prevent this, with the new battery disconnected, turn the key in the ignition to ON. Make sure the door is closed, and then connect the battery.

This prevents the alarm from going off.

What I did was to install a battery disconnect switch that I use when the van is sitting for more than a week. Now after it has been sitting for awhile, I go out, put in the key, flip the battery switch, hop back in and the car starts.

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16y ago
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Q: How do you disable your alarm in your 1999 Chevy Blazer - it keeps going into alarm to the point it drains your battery?
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