I am trying to install an amp and sub into my oldsmobile intrigue and i cant seem to find where the power can pass through the firewall. If anyone can help it would be much appretiated. thanks

 

You can drill a hole in the steel. Use a grommet.

Or you can usually cut through the big rubber boot around the steering column on most GM's.

Or, you can drill through the big rubber/plastic block beside all the other wires on the main chassis connector, usually near the passenger foot well. Which is what I did.

 

is there any way to pass the wires without drilling?

 

Yes, option 2 above. Cut the rubber boot around the steering column.
A simple utility knife works great. don't cut too big unless you like wet feet.