According to the Chevrolet Malibu Website, they compare different features on different models and I believe it says that Remote Start is not standard on the LS and LT1. Remote Start is Standard with the LT2 and LTZ (I have the LT2). I believe the LT1 is "Remote Start Ready", so it can be installed, but I'm not sure how. With my car, there's a button at the very top of the Key Fob with a semi-circle and an arrow at the end. It's a nice feature, but I really haven't had the opportunity to use it yet. The weather has been moderate, so I haven't had to cool or warm the interior.
One added feature of remote start is the Key Fob has a much larger range than a non-remote start key fob. My previous car had only about a 15 foot range. Today, I was a block away and I hit the lock button and it activated. That had to be several hundred feet away.