I need help!!!!!!!!! I just bought an 04 avalanche and I have not been able to find anybody thatcan build a box that fits under the rear seat and allows for the halfgate to operate without removing the box. Can somebody help me! I want to get the best sound out of it. I can only get a sub w/ a 5.5 in md to fit. I want to get two 10"s to fit or 2 8" if i can not get 10's to fit. I am only allowed about .5 cubic ft per sub. A vary tight fit by all means. Any suggestions on a box or subs that will fit. Any avalanche owners that have found a solution please respond. Thank You!