Gauges cutting out

Intermittent gauges usually mean a bad ground connection for the gauges. Things to check: look for multiple ground connections at one screw to chassis frame & tighten it; check large connector at rear of instrument cluster for good connection; replace gauges fuse - it can be cracked. If none of those work, than instrument cluster circuit board will probably have to be replaced - which means removing the cluster.

Sounds like an intermittent loss of power to the instrument cluster to me. Remove the instrument cluster and inspect the electrical connectors on the back of the cluster.

You need to have your insturment cluster repaired !
How to repair GM Instrument Cluster Speedometer Gauge Stepper
Beside stepper motor problems the solder used on these clusters have a problem called silver migration . Can cause all kind of problems ! What this video from eric at south main auto .
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loose connection in the wiring somewhere.

possible battery and or terminals, also remove cluster clean and apply a film of dielectric grease, if doesn't solve need to replace cluster

Hello,
If you are looking to install these gauges into your factory cluster it is possible as it is not a computer cluster. I would look into buying a professional cluster made for hotrods that is already done as there is alot of work to do to make the Autometer gauges fit nice and clean. There is a plastic cover over your factory gauge set and it will be dificult to get it cut out and set rite for the new gauge set. maybe if you built your own cluster unit you could use one of these Billet pieces as a template. Thats just a thought I have done this and It looks nice with a rose wood underlayment routered out to fit the gauges.
http://www.trucknvans.com/Billet-Center-Dash-s/673.htm



I hope this helps.

Roy

Is it the entire instrument cluster or only some of the gauges? Check this page for more about Trailblazer instrument cluster problems - Trailblazer instrument cluster fix

Its very common on a lot of cars, the instrument cluster has a number of connectors soldered onto the circuit board, the solder joints get loose or are bad to begin with and you will get these kinds of intermittent display issues. They are a pain to fix because the entire cluster has to be removed, just to solder the joints! The soldering is the easy part, re/re of the unit is the real pain. If you go through the trouble make sure you also inspect every solder joint on the board while its out..you don't want to do it a second time!

replace the circuit board in the cluster.

you may of pinched or cut a wire while installing the cd player. or possibly when hooking up to power, you plugged into the power for the instrument cluster