Sadly, hearing “Arrested Development” star Will Arnett’s voice as KITT on the upcoming NBC revamp movie was the only reason I planned to tune in to watch “Knight Rider.” Now, that’s not happening.

Instead, Val Kilmer will provide the voice of KITT. What happened?

Will Arnett has already completed his voice over work, but a contractual conflict of interest was discovered that had the “Knight Rider” team switching gears (hey, that’s my best attempt at car humor).

Whether you realize it or not, Will Arnett has lent his voice to General Motors commericals for quite some time — voicing ads for GMC Trucks.

The conflict here? KITT is as Ford Mustang! Since Ford plans a marketing blitz with the new “Knight Rider,” General Motors didn’t take too kindly to that.

So, Will Arnett is out — Val Kilmer is in as the voice of KITT.

The “Knight Rider” movie airs on NBC on February 17.

Will Arnett said of the switcheroo:

“I was very excited at the prospect of playing the part of KITT in the new ‘Knight Rider’ movie. However, because of a long relationship with General Motors as the voice of GMC Trucks, I had to respectfully withdraw from the project.”