First post, wiring?

[Pressureangle]

2004 Yukon XL 2500, 8.1L, high options.
Just acquired it, bought it for Mom ten years ago. She quit driving, Sis-in-law drove it for the past 6 or so. She's fat and climbing in she tore off the driver's side A-pillar cover, no damage but there's a small harness with 4 wires; black, white, red, blue. Small gauge. They're torn free from something, I'd like to know from what; it has the overhead entertainment center, which of course I didn't test before posting but everything else works normally.
Anybody got this on top of their head?

 

[RST Dana]

I can’t help, but I’m digging that 8.1

 

[Pressureangle]

I can’t help, but I’m digging that 8.1

My new tow pig.

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

I cannot personally assist you with your issue, but other members of this Forum much more knowledgeable than me in this area will chime in. @OR VietVet

 

[Pressureangle]