Peterbilt · Class 8 long-hood conventional tractor
Peterbilt Model 589PACCAR MX-13 12.9L (standard), Cummins X15 15.0L (optional)
Built 2025-2026
Engine PACCAR MX-13 12.9L (standard), Cummins X15 15.0L (optional)
Sources checked 117 of 131 (89%)
What it is
Peterbilt's new flagship long-hood conventional, introduced for 2025 as the successor to the 389. The 589 takes the classic 389 shape and modernises the engineering — new cab interior, LED lighting, updated chassis, and the full PACCAR integrated powertrain.
Pick a folder
Fluids & Fill Amounts5 entriesBolt Tightness51 entriesWhen to Service12 entriesWarning Lights & Codes30 entriesHow to Fix It77 entries
The truck itself
Engine options
PACCAR MX-13 12.9L (standard), Cummins X15 15.0L (optional)
Horsepower
405-510 hp (MX-13); 450-605 hp (X15)
Peak torque
1,450-1,850 lb-ft (MX-13); 1,650-2,050 lb-ft (X15)
BBC
123 in
Cab
All-new cab interior; 70-in or 80-in sleeper
Transmission
PACCAR TX-12 PRO 12-speed automated (standard); Eaton Fuller manual; Allison automatic
Front axle
PACCAR / Meritor 12k-13.3k
Rear axle
PACCAR DX-40 40k tandem (up to 52k; tridem up to 78k)
Weight class
Class 8 - 40,000-52,000 lb tandem rear
Before you order anything
Options change the numbers
The 589 was introduced for the 2025 model year as the replacement for the 389, which ended production in 2025. It shares the PACCAR powertrain with the 579 but in a longer, more premium package. The 589 is the newest truck in this library.