Val KIlmer takes over for Will Arnett as the voice of KITT on Knight Rider.

/film:
In one of the silliest signs of a world run amok in corporate Brawndo tie-ins, Arnett has done commercial voice work in the past for General Motors, and K.I.T.T., see, is a Ford Mustang. Kablowski! That invisible line in the industrial sandbox? Well, Arnett just crossed it. But he still had time to jump back over said line, cover his tracks and allow Kilmer to swing in using a vine made from his absolutely batshit resume to save the day and grab a nice payday (PayDay?).
“I was very excited at the prospect of playing the part of KITT in the new ‘Knight Rider’ movie,” Arnett said to Variety\. “However, because of a long relationship with General Motors as the voice of GMC Trucks, I had to respectfully withdraw from the project.”