Can I Perform My Own Trailblazer Instrument Cluster Repair?
Well, that depends on a few things! To repair your own faulty gauges inside your cluster you will need to either have a little experience soldering and desoldering components on a circuit board or be willing to learn and give it a shot. I'd say most mechanically inclined people won't have any trouble doing it themselves if they have a little help along the way. There are a few sticky points during the process that you will want to be aware of before you start so having a guide or tutorial is a big help. If you haven't already, you might want to look into this tutorial.
I'd Rather Have Someone Do It..
No problem there, sometimes it's best to leave certain things to a professional if you don't feel comfortable doing them or just don't have the time. Have a look here for a GM instrument cluster repair specialist.