For LA Financial, you need to go thru the whole process, then cancel after you get the loan docs. Then send that to LightStream and your done. I did it because my delivery was cancelled and VIN was reassigned. So the loan documents had to be cancelled since it was tied to the VIN, but before it was , i sent it to Lightstream and was approved in 3 hours. Then i waited till 2 days before the next delivery and it was funded the next day and cleared they following day when i oicked up my car. Just walked in with a cashiers check from my bank as if i was payin cash.
When i was tryin to work with LightStream, no pre-approval of anything was accepted except for the offical loan docs and terms to which they will match exactly and beat the rate by 0.10%.