Z11

i want to know if anyone have gotten an after market alarm system installed? and if so, where and how much.

and if any speakers were installed?

also, if you the the speaker size for the
1. door panels
2. tweeters
3. mid range
4. sub woofers

btw, the dealership didnt even know the answer to this, it says 8 speakers, 2 tweet, 2 mid range, 2 door panels, DUAL sub woofers, but i only see 1 sub woofer? and do we have an amp to power the woofer or woofer(S)?

thankz