Boost gage not working right how do I fix ?

 

Can you provide more information? I'm not familiar with the Supercharged version of our cars, but I'm sure we have someone here who is, but a little more info would help.
- Does the gauge respond at all?
- If so, how does it react?

Our instrument clusters are known for stepper motors failing in them. It could be that has failed OR maybe a sensor that feeds the data to the boost gauge. Just some thoughts.

 

It's all the way down no movement at all

 

Does it sweep when you first turn car on ?
The gauges needles should sweep when first turned on..

 

No it in the middle it move once In a grate while which is barley ever theres was a recall on it but had it for like 3 years now so ....

 

I had to replace the stepper motors in my gauges & the ones in my wife's
2005 Impala SS., I bought them on ebay .. Just watch video on youtube..
Here's a LINK:

Chevrolet GM Speedometer Gauge Repair Removal Instrument …" target="_blank">Chevrolet GM Speedometer Gauge Repair Removal Instrument …

It's not a monte ,but it's the same for a monte...

 

Sounds like a stepper motor to me too.