There are some concessions the union had been pushing for, but the closure of the Lordstown, Ohio, plant remains a sticking point.
"We're getting little pennies compared to [GM executives]," one worker told Marketplace's Tracey Samuelson.
The UAW strike across the country could cost General Motors upwards of $100 million a day.
Workers shut down 33 manufacturing plants in nine states across the U.S., as well as 22 parts distribution warehouses.
The United Automobile Workers told its members it would increase strike pay from $200 a week to $275 by January.
The vote comes as U.S. Steel and ArcelorMittal are in union contract negotiations.
"I will be the greatest jobs president that God ever created."
Make Me Smart with Kai and Molly
Listeners weigh in on how their businesses have been affected by the constant state of protest.
While a massive headache for local residents, the strike could also have national consequences if it extends to next Tuesday.
They're demanding residual pay and safer conditions as games become more elaborate and lucrative.