Buick Excelle 2015 remote key has 70 bit big capacity chip which requires to security pin code to program the remote. Here is the guide on programming Excelle 2015 remote key by using SKP1000 key programmer.
Get pin code from car Chassis which is the same as new LaCrosse and New Regal.
(Lonsdor CI600 Plus is the Chinese version, SKP 1000 is the English version)
Connect SKP1000 with vehicle via OBD diagnosis socket
Select Immobilizer function->Buick->Excelle 2013-
select Immobilizer system
Select Add a key
SKP-1000 detect current 2 working keys
Turn ignition OFF for 5 seconds, then turn it to ON position
Enter security pin code to access
Confirming pin code, please wait about 5 minutes
Configuring…please wait for 10 minutes
Turn ignition OFF
Turn ignition ON
Remove the key
Configuring…wait for 45 seconds
Then back to Excelle 2013- menu
select Program remote
Pin code is also required.
Follow SKP1000 key programmer prompts until remote programming success.