I bought my 06 ls v8 about three and a half months ago. Unfortunately, it has been at the dealership for two of those three and a half months now. I started noticing funny patterns in the shifting. would shift whenever it wanted even withough changing the pressure on the gas pedal. Sometimes it wouldnt down shift after stops etc...... the dealership said it was the instrument cluster and they would have to order it. However, there are no companies out there aparently that re-manufacture this part and they cannot get out. has anyone else out there had this problem? also any other major issues i should be concerned about with the car? very frustrating