1500 and 2500 4 crew and ext cab sub boxes

if you need a custom sub box for your silverado try one of these they rock. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=013&sspagename=STRK%3AMESE%3AIT&viewitem=&item=230082881908&rd=1&rd=1 or go to www.tech12volts.com 
 
These are custom enclosures for those of you tired of cheap prefab enclosures