Hello All, I have a 1999 sierra with a cluster problem. While you are driving along, the gauges and lights will go off and come on just like you turned the key off and on. I checked every thing I could think of. Has anyone else had this problem? Im at wits end with this truck. Thanks................

 

Are you talking about the cluster gauge lights? I've had my 2004 GMC cluster replaced twice. Once due to the speedometer acting up and once for the temp gauge not working. The cluster has been a real problem for GM from what I hear.