i have a 2018 suburban premier that i bought after it'd been in a wreck so i can't file any warrant claims. i feel that my issue is the antenna amp. i'm just wondering where this is located and if i can replace it myself? they dont' seem to be too spendy, roughly $30-40 online ($65 at dealer). it looks fairly plug and play but i dont' know if there's anything else the dealer has to do to make it work. any help on this would be great before i spend $80 on a diag at the local chevy shop.