Movie when robot trucks try to kill humans

I remember there was a movie where the trucks where robots and would try to kill people. All of them had characteristic fronts. And the movie ended with the main characters sitting in a helicopter which turned out to be a robot too. Anyone knows this movie? Thanks

Maybe Maximum Overdrive?

http://www.imdb.com/title/tt0091499/

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Thanks so much! That's exactly it. I remembered the funny green face of one of the trucks!

Are you sure? They weren't robots. Only one truck had a face on it, and all appliances, vehicles, yard tools, etc. . . tried to kill people. Anything electrical. Also, it ended with them getting on a sailboat, and sailing away. There wasn't a helicopter in it.

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There's also 'Trucks' 1997

http://www.imdb.com/title/tt0120380/?ref_=fn_al_tt_1

If memory serves, that was, for the most part, just vehicles. Also, if I'm remembering correctly, that movie does end with a killer helicopter. Maybe he's combining both movies here.

I've watched both of these just a couple months ago.