yesterday i started my trk put it into reverse and the shift indicator was flashing, the trk did not move, and the service engine light came on. I put the trk in park and then into reverse again and it moved, but was in limp mode. drove to my chevy dealer and he hooked up the tech2 and got the following codes, p0700, p07847, these 2 kept coming right back after he reset them, codes p0181, v1000, c0272, and c0281 were there and cleared. i drove the trk home and it shifted fine and the service light went out. what are these codes, and any idea what my problem is. trk is scheduled to go back on apr 12th. THANKS!