Thread: 2008 pontiac grand prix lemon

Well, it has been a couple of weeks. Took the car back to the dealership. The mechanic who has done work on my car a lot took a ride so that we could duplicate the problem. Immediately not even going up a hill going about 35mph the car starts surging and bucking for about 15 seconds. They kept the car a couple of days and could not duplicate the problem. They told me to call them when it breaks down because they cannot figure out what the problem is. I am thinking it is the transmission and they dont want to deal with it. They claim they have checked everything , and since their are not any engine codes they do not know why it is doing this. I am concerned because I do not want to experince what will happen when the transmission goes out or engine whatever the problem may be. Is there anyway for them to diagnose it? Symptoms that I have been experincing for about 2 months. In june the dealership said the transmission was going out and we both agreed to replace it with a new one. Well that didnt happen, they instead replaced a wire I do not know the exact part something to do with the transmission. After that is when i noticed that sometimes I felt a slight hesitating when accelerating up hill. Now it is 100 percent worse. Anyway I am done venting if anyone can give me some sort of idea what this problem could possibly be I appreciate it . THANKS