Today I pick it up my JGC, here are the parts and diagnose, accoridng to the invoice:
Alarm issue: ALARM GOING OFF BY ITSELF CHECK WITH SCAN FIND TRUNK LIFTGATE STATUS OPEN AND B259E-OO ACTIVE ALL TIME.
68083083AA and 5KT49DX9AD
REMOVE AND REPLACE LIFTGATE LICENSE LAMP BAR ASSY MODULE INTERNAL FAILURE INSTALL NEW, ERASE CODE, TEST ALARM - OK NO CODE RESET
I hope this info can help you, but that I read, you will need more that change the parts, a error code must be erase in the computer .