As has already been stated, do NOT fix it yourself.
When you get to the dealer, tell them that it stopped working.
You know that you can get it replaced for $2000.
The dealer can get it for less than half that.
They will try to push the number down, and you should expect it to go down.
But armed with the actual cost to a consumer and the knowledge that the dealer can get it for much less, I wouldn't let them push down much more than about $700-$800. They shouldn't let you walk away from a new rig sale for a couple hundred dollars.
If they anything changes from the original deal, on either side, then the other side has the option to back out.
I would check to see if it can be repaired first.
If you can repair for a couple hundred, then you have saved $600 to $1800.