Re: Has anyone seen rust in this location?
This is a very common rust area in older Malibus; I'm a little surprised to see it in a gen 7. It is caused by a sanding like condition brought on by the front tires. Sand, rocks and a combination of rain, possibly salt and other road debris hit this area. In time, this area becomes rusted. The only true way of getting rid of rust is to cut it out; The body repair person will need to cut out this rusted portion of the lower rocker and weld new metal in its place. The auto body person will also need to check behind this area to spot any signs of rust. Make sure that the body shop spells out that they will cut out the rust; Many shops will simply sand the area and re-paint. You might as well flush that money down the toilet, because the rust will surely return with just sanding or applying body filler over it.
I have had a lot of experience with this type of rust, and it can be expensive to fix, let alone there is no guarantee that other areas of the car will also rust. What you can do (if you don't have this rust yet) is to make sure that the car is clean, and apply a generous amount of wax in this area, and around the rim of your wheel openings. A lot of people don't fix this rust as well, as the car may have aged significantly or it has a lot of miles on it.
I also read of a '13 having rust. '13 cars or younger will need to go right back to the dealer, as GM has a specific warranty against corrosion and rust thru. a '13 car should not be rusting at all.
'02 CAMARO SS SOM; 5.7L LS1/FLS6B
'08 TBSS AWD Black Granite Metallic
'15 Malibu LTZ 2LZ Turbo
'14 CAMARO ZL1 Blue Ray Metallic