well it started when I did and oil change last month on my 2007 aveo5 LS (83000 miles). I accidentally drained the tranny instead of the oil pan and added 4 quarts of oil. It started smoking furiously and did not shift right. Got home and changed the trans filter and added fresh ATF, ran the codes P0700 and P0752, ordered a shift solenoid and swapped it out, still the same dilemma. I also cleaned out the vac system and throttle body of the oil, ect.. I am thinking maybe some oil spewed out and lodged itself someplace that is affecting the transmission from shifting into 3rd. the only prior experience i had a few months back only once I stopped at a stop sign and the car stalled out and it showed code P2135 I cleaned the connector and it went away.