First post here so apologies if im in the wrong section.
I bought 2 credits to tune my 03 silverado yesterday and wanted to make some adjustments when i went to write my new adjustments in it asks me to buy 2 more credits or 6 credits to unlock unlimited to my specific year.
My question is, since I've already used 2 credits on my first write do I only need to buy 4 more to unlock unlimited or do i have to buy all 6 at once?