I just found this on the Chevrolet website:
2011 Chevy Malibu Sedan Specs and Features | Chevrolet
On the left side column it says:
Flat/dinghy towing
Tow with all 4 wheels flat on the road. You wont need a trailer to tow Malibu behind your RV.
Also found this on a towing forum:
I have a 2011 malibu 1LT 4cly that I recently purchased to tow 4 down. After reading the post here I called GM customer service at 1 800 222 1020 Spoke to a rep name Robert, talked to him about towing 4 down and etc > Gave him my vin# so he could verify the transmission in my malibu. He said he would find out about all my concerns and call me back in 4 days which he did, said my malibu had a 6T70 6 speed tranny and could absolutely be towed with 4 down.....I owned a 2007 malibu that I towed and never had a problem of any kind..
So I think I'm good.