the USA spec is a good unit too. they are about the same, i just know the Preferial works. and you keep everything. i might be mistaken, but i think the USAspec takes your XM out. not sure about this tho.
__________________ LLY+Allison 05 Black Chevy Silverado 2500HD LTZ85 Crew Cab Short Box
Eaton Lockers, 5" Turbo-Back Stainless Pro Series, lost/stolen cat (reward if found), SuperChips FLASHpaq "stacked" on an EDGE Juice w/ Attitude, PPE Variable Boost Controller, K&N Intake System, 20" American Racing Chrome Wolverine's, Xentec 6K HID kits, ReadyLift Leveling Kit, Peripheral iPod integration, Viper 791xv, I hate mods lists!!...blah blah blah...
__________________ 2006 LLY with some miles
-EFI Live(Best Investment Ever!!!!)
-Turbo-Back RBP 4" with no muffler and my cat ran away
-limo tinted windows all the way around except winsheild
-18"MKW M25 with 285/65/R18 Toyo A/T
-Afe replacement filter
-Cogneto Leveling Kit
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(reward if found), SuperChips FLASHpaq "stacked" on an EDGE Juice w/ Attitude, PPE Variable Boost Controller, K&N Intake System, 20" American Racing Chrome Wolverine's, Xentec 6K HID kits, ReadyLift Leveling Kit, Peripheral iPod integration, Viper 791xv, I hate mods lists!!...blah blah blah... 
Linear Mode
