Instrument Panel Cluster

I believe this is a common problem on this instrument panel, check this site, they list what come of the problems are and they can rebuild the unit too: http://bit.ly/8z7rcm

You have a faulty instrument cluster. GM is covering this 7yr/70k. If not covered it's close to a $500 job. Quite common also. Did mine at 58k.

This is very common on the 03-06 GMs. The cause is the motors behind the gauges are failing, they all go out eventually. You can get it repaired here - www.drspeedometer.com and there's a DIY guide here - www.howtorepairmyinstrumentcluster.com