I've had some problems with my battery lately. I have a 2006 Limited Convertible.

Searching the forums I found that a lot of people were using the Interstate MPT-H6.

They didn't have htis in stock at the store, but what they did have was an AC Delco with a 5 year warranty. AC Delco 48/91-60. It fits perfectly. It's a tad shorter(millimeters), but nothing a rubber washer on the srewdown can't fix.

This battery turns out 725 CCAs!

The car turns over better now that it ever has. This battery is superior to the original without a doubt.

I would highly recomend it. I also installed a trickle charger for the winter months when my baby is in the garage.

-Kevin