Peterbilt 389 Discontinued 2024 Model. The model 389 will end its historic production run at the end of the year. Its successor, the new model 589 introduced earlier this year , is now available for order through any of.
Of torque for maximum performance. The model 389 replaced 379 in 2006 with redesigned headlamps fenders and trim, and the 379 itself replaced the venerable 359 in the late 1980s.