Yes, it was Duel.
Duel was one of those movies I couldn’t believe I was wasting my time watching, but I couldn’t stop watching it.
Spielberg has always had that way of hooking me.
A little Duel/Jaws trivia. When the Truck in duel falls off the cliff, and the shark (what is left of the shark) in Jaws sinks, the same sound is used. It is a sound of a B movie dinosaur played at slow speed.