1st thing that needs to be done, is Parasitic Draw needs to be measured over a small period of time. 10-30 Milliamps is normal, 30 is a little much though.
On these cars, On-Star is a common problem. Every 10 (give or take a little) minutes, On-Star draws 300 Milliamps in order to communicate with "Home Base". This gives On-Star operators the opportunity to communicate with your car, if you lock yourself out, or it is stolen, etc. Sometimes On-Star's draw wigs out, and doesn't stop pulling the 300 Milliamps.
It could be intermittent, or it could be happening all the time, but the NEW batterys are supporting the draw, for about a year until they start to get a little weaker. The constant drain can be fairly hard on a battery too, wearing the life right out of them.
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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