When mine first went, no Chevy dealer would help me, they all said I was on my own. At the time there was no recall. I wrote the NHTSA about what happened to me, and I suppose I wasn't the only one. A couple of months laterafter the repair I was contacted by GM about the recall. I had to submit the bill from the repair and a copy of the vehicle regestraion, etc. and milage. And they paid pretty quickly.
You've got to remember, GM doesn't want to lose any customers, they are hoping you will come back to trade up for a new vehicle some day. To me my Tracker is unreplaceable. I bought it because it had a full frame around it and a true Transfer case with a low range. A 4 cyl with a 5 speed, for milage. GM doesn't have anything like my Tracker anymore.
As a side note, Toyota sent out a form to pickup owners about rusting frames, I know a couple of guys that had a problem, and Toyaota WAY MORE than took care of them. One guy bought a brand new p/u ext. cab 4WD 4 cyl. 5 speed, real nice. Just my .02