Oh! Heavenly Dog, 1980

Chevy Chase plays a private dick who gets killed but gets a second chance at life by coming back as a dog. Here’s the catch. He only has 48 hours to find out who murdered him, and if he doesn’t, he’ll have to die all over again.That’s kind of dark when you think about it. But we never said it was a Disney film!
Source
//www.youtube.com/watch?v=W29-B47dcVA