I'm looking to buy my first rack for my Tahoe. I have a few questions about the system. First, has anyone had the rust problems? Second, with the bike still of the rack, will I still have access to the rear of my car?

I've used this rack for 4 years and have not had a rust issue. It stays on my 2000 Explorer all summer and I park outside. I believe that on a Tahoe you can open just the rear glass, and not the full tailgate. If this is the case you will likely be able to have access through this opening into the rear cargo area. The only way to know for certain is to try it out with your bikes. With my two bikes, I have about 1" clearance for the glass to open. The other option is that the rack does fold down away from the vehicle the same way that it folds up and out of the way without bikes. This allows me to open the full tailgate with both bikes still on. The downside is that its heavy and awkward to do this and the bikes still partially block getting anything large out of the cargo area. It literally only takes about 10 seconds to load/unload a bike, so I typically just do that. This rack is expensive, but if you plan on using it more than once or twice a year, or for long distances, it is worth every penny.