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 - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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