I was on the freeway in pretty heavy traffic. The traffic started to disperse and as I accelerated, the notification chime came on and the dash message said "stabilitrack off, traction control off, engine power is reduced". I could not drive any faster than about 20mph and it was jerking a bit. I pulled over and pushed the onstar button. They sent a tow truck and after sitting on the road for about an hour, when I started the truck again, the message was gone. I had it towed to the dealer anyway, and was told that it is a sensor problem, which is not covered under the powertrain warranty. I have a friend that has a 2007 Tahoe and she had the same problem. Also, according to a few message boards, many other people have had this problem also.

- Buena Park, CA, USA