Do Not Disconnect Car Batteries for long!!!
By the way, do not listen to someone who says disconnect the car battery and leave it. The CPU needs a charge and if it loses its programming, it can be a tow bill and 3 hours at the dealer downloading the software.
A Fellow parked his 2012 Vette for the Winter under a car port. He disconnected the battery and took it inside. Next spring the total bill was $900.00!!! The CPU lost its programming when it powered down. The CPU has a small battery usually (sometimes called an ECM or PCM), but this is only good for a week at best. Similar to your home computer mother board in a way.
No way to download the software in a modern car without a friend at the dealership helping you out. It is proprietary software and usually takes some level of expertise to do it.
Drewski
Drewski
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