I have a 2003 chevy with just over 145,000 miles . I just believe the car wasnt all the way thought out!!.. I ve had to replace fuel pump twice a 1,200- 1,500 job!! VERY expensive, the car stil rides smooth . Only other problem i have is the heat gadge it does its on thing sometimes. i usually have to keep air or heat on to keep it stable!! No one seems to know issue. Also if i shift gears lik maybe from reverse to drive to fast the car jerks really HARD, kind of scary to be honest i almost thought the tranmission went out but chevy just said to change gears slow i mean wow how slow am i suppose to shift . .. this also happens in the newer present models i dont like that at all !!