A PO installed it in mine and I like it. I did replace the speakers that it came with, though, because they were, um, more intended for people without serious taste in high fidelity, shall we say. I got the originals out without taking the thing down, even though they were mounted from behind, by uninstalling them with extreme prejudice. Basically cutting them apart through the holes and removing the pieces. I replaced them with Kicker DS400 speakers, and added an active subwoofer on the rear cab wall. The Kicker speakers mounted using speed nuts on the headliner with no problems. I like how it all came out, and the sound quality. I hooked the two passenger speakers to rear, and the two driver speakers to front, so I can use the fader to kill the passenger side ones when I am alone.
Here's the current Kicker 4" DS-series speakers:
Amazon.com : Kicker DS40 4-Inch Coaxial Speaker...
Here's how I did the subwoofer:
http://www.fullsizechevy.com/forum/g...oobs-rcsb.html
Finally, here's a pic of the headliner in my truck.
