I took delivery of my truck late last May. I discovered when I went to look at it that it had been stored on the remote lot since the day it arrived. That raised a yellow flag about how long it had been exposed to "industrial" elements.
Here in Southern California, we have the late night/early morning low clouds, morning drizzle, and the typical dust & smog. If I recall correctly, a wonderful carbonic acid mix for the moisture to react with.
Though I took delivery around noon, the salesman pulled me aside and stated they had acid washed it and he noted on some paperwork I had actually taken delivery at night.
He said this would allow for me to bring it back for any paint/finish defects at a later time.
I washed it the next day and my chamois felt like it was dragging on a non skid surface.
I pulled out the clay bar and really wasn't getting a lot of drag or crud so I went ahead and 'polished' and then waxed. I didn't get any crud on my applicators or finishing towels. It's been as smooth as a baby's behind ever since.
The salesman also told me, if I had any issues with the paint, they would resolve it within 1 year of purchase. He specifically said that would include repainting, if necessary. Of course this was all verbal and none of it is written anywhere.
I don't have any issues, but was surprised he brought this up.
If you're having issues and you're still under 1 year of delivery, start talking with your salesman/service department.
On an aside here, I took delivery of an 04 Cadillac CTS that was delivered last September and I acquired in late February. This one was on the dealers main lot but even closer to the ocean.
Remember the fires we had last October. There was a tremendous amount of ash fallout for several days. And then it rained before it could be properly cleaned up.
None of the paint/finish discussions I had with the Avalanche dealer ever came up.
The finish on this car was stiff too, but not as much as the Avalanche. Same procedure; clayed for awhile and went directly to polish & wax. No problems.
I haven't looked too deeply into the CTS owners manual to see the discussion on paint. It seems like there were several pages in the 03 Avalanche book on this subject.