CorvetteCowboy

I just purchased a 2005 coupe for my girlfriend. Automatic with a Z51 package. Car has an aftermarket exhaust (corsa) on it. Car runs real nice however after sitting for a few days it kills the battery.

Anyone have any ideas why?

rvsullivan

How old is the battery??

EVRose

You must always put it in reverse before shutting off.

nevermind. I see it's auto.

CorvetteCowboy

Brand new, there is a unknown power drain in car

EVRose

You could put a multimeter on the battery and start pulling fuses and look for a voltage change.

ruxvette

Usually the on-star. However, I think there was a DBS (dead battery syndrome) on '05's that called for a computer re-flash. Make sure your has had it done.

EVRose

That was my first thought too but that was for M6. He has A4.

martinf55

More electric issues to come.

ruxvette

Pull relay #46?

owc6

I thought Onstar was no longer supported on the '05. Which may mean nothing, or there is a draw from that no longer being "minded."