If you haven't read through all 21 (or 30 - these forums seem to move around) pages of the thread, the few things I think you should know (based on my reading and experiences) are:
1) If you do buy aftermarket, non-permanent racks keep the following in mind:
-Do NOT over tighten them. There is a specific torque amount specified and going beyond that can lead to you actually damaging the sheet metal on your car. At least one member here had that issue (which was, fortunately, covered because Chevy had mis-represented the correct torque numbers).
- Be aware that the racks very well may not (most likely won't) fit properly between the roof and the door frame. This was the issue I had. The only aftermarket vendor was Rhino Rack. Their racks were advertised to fit our cars, but it appears that some, if not all, of our cars have extremely tight tolerances between the roof and the door frame. There simply isn't any space in there for the clamps to hold on to the roof without actually pressing agains the painted portion of the door frame. If your car is like that, you will have to contend with the door frame hitting the metal of the rack and getting chipped, especially when you are driving and the vibrations cause the two parts to rub against each other. The chevy racks appear to have the same issues. Scan through the thread to look at all the pictures at least. I can also send you some pics of the rack clamp on my car if you need something to compare to (I wound up returning the racks).
2) Permanent racks seem like the only reasonable solution. As LorbeerTLC pointed out, Perrycraft makes them. So does Yakima and Thule. They are expensive to have installed (racks + installation were quoted at nearly $1000.00 for Thule for me). You could save a boat load of money and do it yourself if you know how to do basic work (i.e. drill some holes etc.). That is the route I am planning to take (because I also need to haul around small amounts of lumber etc.) but I have hesitated till now for a couple of reasons:
- Having someone else do it is expensive plus I am not convinced that they won't drill into an airbag or somehow hit one of the structural crossmembers in the roof. The people doing this (generally, not always) are just highschool kids with a summer job, not experts per se. At least they aren' t experts at our cars. And they will just drill and patch vs. taking the time to do it right. LorbeerTLC seems to have found a decent place to do it, though, so not every place is a fly by night operation. Still, the airbag thing kind of concerns me enough not to hand it off to just anyone.
- Talking to an auto body shop (who I was hoping to hire to do it), they were concerned that the nuts holding the rack to the roof were very small and the roof sheet metal is very thin. In other words, if you have some sheet goods up there (plywood or something) and a strong gust of wind comes up that these small nuts might come ripping right out of your roof. The only way to prevent this would be to re-inforce the sheet metal around the holes and nuts with some thicker sheet metal (it can simply be clamped in there like a big washer). This will distribute the forces over a much larger area.
- Doing it myself means taking out the headliner. That ensures that I can locate the airbags and the cross members as well as add in the extra sheet metal "washers" to distribute the load. But I barely have enough time to search for parking these days, much less learn how to remove the headliner. Still, this final technique (whether I do it myself or hire it out to a body shop) seems like the best idea.
Finally, LorbeerTLC and others have actually had the work done, so I would defer to them as to whether my concerns are valid or worth the time it takes to type them out
Good luck and let me know if you need me to send you the pics of the rhino rack not fitting my car (these are the pics I used to get them to refund me my money - they said they would change the status of their racks from "fits" to "may fit with some issues" as a result.)
P.S.
Here is the photo of the Rhino Rack on my car. Note that the image here shows the absolute best case scenario... i.e. there are no bars installed (or towers). This is just me trying to fit the clamp in between the door and the roof at its most ideal angle. Once the towers and bars are installed, it fits much much worse. So, take a look and see if your doors are similarly close to the roof line of your car. If so, permanent racks may be the only solution.
https://www.dropbox.com/s/mws1nmroralnhnw/20131125_103040.jpg?dl=0