Hey having a bit of a problem with my ENVOY. Where can I pass the power wire through the firewall of the Envoy and where can I ground the amp wire in the trunk? also is it possible to run the factory speakers of this car with an after market head unit?

let me know

thanks for the help

 

I dont have much experience with envoys but as for the speakers i am sure you could run stock speakers with an aftermarket deck but you maybe pushing them a little to hard and they will sound distorted at higher volumes.