The instrument cluster in my 04 chevy trailblazer goes crazy. From working to no working to dinging and flickering while driving and now my abs and parking brake light are on constantly also I have now air flow thru my vent front dash but the foot vents blow hot air constantly even with the ac on any help or ideas on what I should do

 

Sometimes a faulty ignition switch will cause some of these issues with the cluster going nuts. GM seems to have issues that I have never seen in other makes with their ignition switches.