Mystery pigtail

[99caddymess]

So I'm working on my 1999 gmc k2500 ccsb. I'm trying to put new speakers in it. When I took the passenger side speaker, a pigtail not connected to anything fell out. It's got tape with the number 8144 on it, and 4 wires. Tan, red, red, and purple/ white. I can't find what it was supposed to be connected to. Below are photos of said pigtail

 

[99caddymess]

So I'm working on my 1999 gmc k2500 ccsb. I'm trying to put new speakers in it. When I took the passenger side speaker, a pigtail not connected to anything fell out. It's got tape with the number 8144 on it, and 4 wires. Tan, red, red, and purple/ white. I can't find what it was supposed to be connected to. Below are photos of said pigtail

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[Caman96]

Looks factory with the tag on it. I thought of this, but I don’t see a match.

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[618 Syndicate]

CD player control plug?
Didn't read the "door speaker" part...

 

[98chevy2500SS]

Power mirror plug.

 

[DonYukon]

Is it the pigtail for the tweeter in the door? Front door obviously. They are usually bundled tight with the door controls so I doubt it but my driver side always comes loose

 

[someotherguy]

Power mirror plug.

Beat me to it. I second this..

Richard

 

[99caddymess]

Power mirror plug.

That actually makes sense. It used to have power mirrors but not anymore. Thank you

 

[99caddymess]

Beat me to it. I second this..

Richard

I think that is what it is