You can watch a video that explains how to do this here: http://www.infinitihelp.com/diy/gcoupe/projects/infiniti_g35_radio_replacement_procedure.htm http://www.auto-talk.net/infiniti-g35-coupe/2003-2006-infiniti-g35-coupe-skyline-double-din-conversion-for-aftermarket-radio-install.html
The Infiniti G-series is a line of compact executive or entry level luxury car produced by Nissan's luxury brand Infiniti. The G35 which is based on the Nissan FM platform shared with the Nissan 350Z, was produced in 2003.
It will depend on the year of the Infiniti G35 as well as if you have the HID lighting or Halogen lighting. In most cases, the procedure will be in your manual. See the Sources and Related Links section below to lookup light bulb information.