There are two types of ballasts for listed years!
Make sure this ballast matches the one on your car!
2008-2011 Cadillac DTS with the same ballast as in this listing only (with four mounting points)!
Will not fit DTS` with three mounting points ballasts (AL 1 307 329 115)!
Tested and is in great working condition
Items purchased with express shipping will be shipped the same day if paid by 1PM Pacific time, other orders will be shipped next day