Anyone have any ideas for a 2000 GMC Sierra ext cab 4*4 I know they are not the best trucks to put subs in but I would like to put two 10 " subs under the rear seats but space is limited.

 

You have enough room to do a single 10" jl in a ported box, tuned to 30Hz.
Works well with about 300 watts, and gets as loud as a pair of 10's sealed, and plays much lower.

 

charlie will disagree with me on this but I like the pioneer flat 10. you can easilly get 1 ft2 and port that bad boy.

 

Can't disagree Shon...haven't tried one yet. Maybe this week I'll do one up. We have more pick-ups here than anyhing else.

 

id its a crew cab you can do four semi deep/semi shallow tens behind the seat sealed, add the power and you can be very happy, amps go under the seat, if its an extended cab you can put four tens undernath the seat with the amps behind the seat, dont need as much power.

 

i think you can fit 2 pioneer flat 10"'s under the seat

 

Or you could fit a couple of 12's and still have room for one extra passenger like this

 

hell, you can do two 12's under trhe seat of you wish. sealed of course, yet again, no one seems to think there is room under there, i dont know why. theres a mound of room!

 

2 10" rockfords P2's, P4004 amp
mine hit 132.5 db at 55hz

 

Put 2 kicker L7 10" in a sealed box in there with a good amp.should hit hella hard.