I *think* they changed from 2000 to 2001 (my 2000 STS is different than my father's 2001 deville). However, my 2003 dhs is the same as the 2001 deville.
Ultimately, you need to match the numbers on the back to check if it will be compatible.
My 03 DHS remote 1 has 25695954
Ultimately, you need to match the numbers on the back to check if it will be compatible.
My 03 DHS remote 1 has 25695954