I have an 06 LS i had 2 10 subs and a 1000 earthquake amp. But I need more trunk room. Two kids you know. strollers and that type of thing. Basically what i want to know is does mine have the wiring for the sub or not.

 

If you had the Pioneer system then yes, it does. If not then I don't think it does.
If you have the system already setup then why not change your box style to fit in the back weel of the trunk. I think a couple people right here are selling them

https://www.cobaltss.net/forums/electronics-audio-video-49/bassforms-wonderng-if-you-want-custom-enclosures-92649/

https://www.cobaltss.net/forums/electronics-audio-video-49/custom-fiberglass-box-intrest-93225/

 

I dont think it has the pioneer system.

As far as those go I'd love to get fiberglass but I cant afford 150-200 per box.

 

your not going to fit 2 tens in your trunk and have room without a custom box reguardless of material type (im 90% sure) and if you dont have the pioneer system you will need to run wires (pioneer system has stock sub so)