Adding my experience since it was this thread that got me my deal:
Checked out Carolina Coop and others, rates offered as low as 1.99% for 72 months. Considering multiple credit inquiries for auto loans in the same period don't count against your score, decided to see what Tesla could do for me first, due to simplicity of application. Applied and received offer via email within the hour.
Tesla offered me:
U.S. Bank
72 months, 2.49% APR
I replied back and and asked if they could check with other partners. Within 10 minutes they said:
BMO Harris was able to offer a lower rate at 2.14%.
I accepted this. To me the hassle of dealing with a small local bank, unknown to me via offline paper transaction was not worth it to me for .14% savings.
Super easy. Thanks for the help forum!
(disclaimer $15k down, 790-820 Credit score)