While driving down the freeway the warning lights all come on, vehicle loses power in traffic and you have to sit on the side of the road and wait. Shut it off, turn it back on, and either it will shift or it wont. If it doesn't, you have to shut it off again and wait. This has happened several times since purchasing it from a crappy lot. So after numerous times of this, we take it to the local gm dealer in Henderson N.C.. they talked my wife into purchasing the almost 6000 dollar transmission, this is with the top notch coverage for it. The vehicle still did the same thing and since it threw different codes dealer wanted to charge us another 200 to diagnose again. My wife had to contact GM who in exchange contacted the dealer and told them to make it right. Now the dealer says they had found a few ground wires that were bad so they repaired those and cleaned others. Our son picked it up since we were out of town, he said it seemed to run better on the way home except the idle felt wrong. The next day he went to drive it and said it was worse than ever, from lights flashing, doors locking and unlocking, climate control warning signs and wouldn't shift again. Dealer told him "well we don't know what's wrong so it may be here a while". Not only do I think they charged for the tranny that is not the problem, the dealer is very rude to my wife and I feel they are taking advantage of her. We are in the middle of relocating her to Alaska where I live so this is taking its toll on us