well i recently have bought a 99 yukon denali and it came with a memphis 1000.1 pushing 2 12' solobaric l5 and in my titan i have a punch 1001 bd a1 pushing 2 12' jlw3 v2 it feels like the memphis is hardly pushing the solobarics.. which should i put in the denali... also let me know what u think about the truck http://cgi.ebay.com/ebaymotors/1999...999-GMC-Yukon-Denali-4WD_W0QQitemZ4635567002QQcategoryZ6249QQrdZ1QQcmdZViewItem