my wife has a 2004 envoy xl that is having some gauge issues. 2 days ago the cluster would just stop working and all the lights come on. the speedo and tach still work.then come back on with the security light and unknown driver. (Radio,ac compressor and power windows also stopped working when this occurs). It doesn't stay off for long and the suv runs fine. Now this isn't the original cluster it was changed about 3 years ago for this one. The original cluster did not have the dic where this one does. Could this cluster be going or am I looking at something else causing the issue? The vehicle does have a green emergency lightbar and t3 strobes and siren installed. but the electrical is stand alone and not wired into the vehicles electrical block.