| welcome to the forum..good questions and the anwsers will very dealer to dealer.
a filter back exhaust can void the warranty but most dealers will look the other way.all programmers tracable or so i've been told but when i had my LBZ to the dealer for some updates i had a PPE on it but i uninstalled it before my trip to the dealer and while i was there i had them search the computer system to see if it ever had a programmer or chip on it and they said no so i didn't tell them other wise but i know of a case were a dealer had known the guy had a programmer on his new LMM and they had a tech flown in from GM and after 4HR's of searching they found the burnt spot and voided his warranty.
__________________ James 
TyreBoyz Pulling Team
Pulling Truck called Late Nights
Puller/DD=04 LLY Reg Cab 2500HD,EFILive'd,Built Tranny and a fe fuel upgrades!
Business Truck
06 LBZ 2500 CC SB SRW,EFILive'd and a Built Tranny
DD/Beat Around
03 5.3L 1500 EC SB,Hypertech,Upgraded Tranny,Exhaust and CAI
Economy Saver
02 VW Jetta TDI,Stock for now but looking at a Chip,Nozzles and CAI!
tricycles = teaching childern from a early age that front wheel drive sucks  | 
Linear Mode
