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88-98 Gm Ext. Cab 2-10'' Ported Poly Subwoofer Box
88-98 Gm Ext. Cab 2-10'' Ported Poly Subwoofer Box
$229.99
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02-2016 Avalanche / Cadillac Ext. Pro-Poly Vented 1-12'' or 15''
[GM-67]
$329.90
by Benjamin Glover Date Added: Monday 06 May, 2013
Here are some instructions on how to install the box into your Avalanche/EXT:
Remove existing factory mid gate and transfer the hinge hardware to the box. Loosely tighten supplied bolts. (you may need to clean out coating out of the holes) Do not install latches on box yet.
Remove rear glass, divider support, and rear cover panels to allow access through the back. It is easier to get the box in this way with the hinges on. Set down on bolts. Bolt it down.
Re-install divider support. Check alignment and seals all the way around. Tighten all bolts.
Install top latches with supplied screws once you have figured out the proper alignment. Check fit. Re-install glass. Check fit.

The box quality is top notch. I have built boxes (or had them built) for every vehicle that I have owned since the early 1990's and I have even had a Stealthbox my last vehicle, this box rivals any one of them. The spray coating is genius. I have a single JL Audio 12W6v2 and it sounds great. I am more of a sound quality guy but this box does help the W6 pound if needed. Overall, a great buy.

Rating: 5 of 5 Stars! [5 of 5 Stars!]
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02-2016 Avalanche / Cadillac Ext. Pro-Poly Vented 1-12'' or 15''
Here are some instructions on how to install the box into yo ..
5 of 5 Stars!


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