Even in the awful Bandit part 3 he had some pretty funny lines and moments, especially with Junior.
That being said, that movie was so poorly directed, scripted, edited, produced, and filmed that heads should have rolled at Universal after it flopped. It's so bad I get depressed watching. I just have a severe childhood nostalgia longing for the black/gold '83 Trans Am used in the movie. I loved that car when I was a kid.