7/12/06 The car has been in the shop for almost a week. They replaced the speed sensor but problem was still there. They just called to tell me that the GM techical folks think that there is a seal leaking in the transmission that is causing the gear that sends the signal to the speedometer to slip at speeds of 75 mph and above. They now have the transmission apart. If that doesn't fix it, they are going to replace the transmission. I hope the cure is not worse than the problem.
Last edited by mannami; 07-12-2006 at 07:03 PM.