I have a 2003 ssei with monsoon i have been through 2 kenwoods and 1 alpine, wired to a gm07b which didnt work and now i have a gmos09 and i hooked it up and no sound so i ran a wire from monsoon amp to fuse tap and amp turn on wire from harness to remote from alpine and i get sound but it fades ...

I have a 03 ssei with monsoon and im trying to replace my head unit and i have been through 3 head units with all correct wiring and remote wires wired up , but the amp is still not powering up and no sound coming through speakers , any help?
I have a alpine radio and a GMOS-09 Harness

How do i get a Pontiac Bonneville club sticker for my car?

Looking for decently loud sounding exhaust/Mufflers for my 03 ssei anybody know any good ones? and length of the mufflers so i know what looking for