i got a 01 extreme i have a kicker 650.4 i have diamond d3 6.5 componets for the door and 6x9 for the back. i know i can just use the rear fill option for the rear 6x9. but my questions is how to wire the front 6.5 and the 4x6's can i use the rear fill on the front crossovers for the 4x6 to tame them down.

 

I would suggest forgetting about the 4x6's. You've got a quality component set, those 4x6's are completely unnecessary and will NOT help the sound at all, only hurt it. Concentrate your time and effort on ensuring the installation of the components is as optimal as possible. Make sure the 6.5's are mounted to a solid baffle, find a good place to mount the tweeters, and get some sound deadening installed and you'll be WAY ahead of the game and all without the use of the 4x6's and in all honesty the 6x9's are pretty useless as well, but to each his own on rear speakers.

 

Cross overs go nicely behind passanger kick but the only place I have found for the drivers xo is between the door pannel and door skin ahead of the window crank. Put it in a zip lock bag.