What exactly is this I found behind my glove box - VCU OnStar Mobile

[my name is alex]

I decided to clean out my ac condenser coils today (cleaned out a bunch of crap!) and had to remove this amplifier thing behind my glove box to remove the fan cover. Here's a link to a random ebay listing for it http://www.ebay.com/itm/CADILLAC-GM-OEM-ONSTAR-MOBILE-VCU-AMPLIFIER-09365789-/272121980227

I haven't reinstalled it yet and can't say I notice any difference in sound from my radio. I do have an aftermarket radio so...perhaps this amplifier only has an effect on the OEM radio?

Is there any reason to put this back into my truck?

As always, thanks dudes.

 

[88GMCtruck]

OnStar was a safety thing that you could call in if you had a wreck, or needed the truck unlocked. It wasn't common at all in GMT400s (i think denali/escalade was the only one really) but you could get it dealer installed. in either case It doesn't look like you need it.

 

[sewlow]

'VCU' = Voice Command Unit.

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[skylark]

'VCU' = Voice Command Unit.

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I almost pissed myself here at the lunch table! I work with one EXACTLY like that.

 

[my name is alex]

Haha, thanks dudes. I definitely don't need this. I don't even know how I would access this service from the cabin...