Has Anyone Done A 2008 Gmc Sierra Before

[dunkoholic]

Hello all, i was wondering if anyone has built a custom subwoofer box for the 2008 GMC sierra pick up.. I need some ideas cause my homie wants me to make him a box for 2 12's!!

[Shyne151]

We stock the box audio enhancers makes for the 08 extended cabs... i've put a couple in with rockfords shallow mounts and they sound ok. Here is what tehy look like:

[dunkoholic]

Thanks... I remember seeing a tread in here that was building a box for a similar truck... he was building the box for under the seat, but i think it was ported... I know it's in here, just can't find it!! :mad:

[timkirkland1]

I've seen guys just add ports to pre-fab boxes with decent results.

[roscoe1129]

I've seen guys just add ports to pre-fab boxes with decent results.

I hope those prefabs were the correct size for a ported enclosure if not thats a recipe for bad stuff to happen

[ptcary]

If you plan on going through the trouble of 'modding' a prefab box, check all the airspace and port specs and maybe seal up one of the sub holes and run 1 12" sub ported in the box above. (assuming it's a single chamber box)

[dunkoholic]

I know I came across a tread in here last week, where this guy was building a box under his seat.. Just can't find his tread anymore!!

if you guys come across it let me know.. thanks..

[timkirkland1]

QUOTE (roscoe1129 @ Sep 18 2008, 01:39 PM)

I hope those prefabs were the correct size for a ported enclosure if not thats a recipe for bad stuff to happen

Yeah it was just a square box for an 8in sub, but when he was done it sounded like 2 12s