Service bulletins for the 2020 Peterbilt 389
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
57 on file from NHTSA, as of 2026-10-19.
By type
By component
By topic
| 20PBA | 2020-04-03. Service bulletin. ELECTRICAL SYSTEM. Safety Recall Interim Bulletin: Peterbilt has decided that a defect, which relates to motor vehicle safety, may exist in certain Model 365, 389, 567, and 579 vehicles manufactured between April 18, 2014 and September 30, 2019 with a left-hand under hood jumper start terminal. Your vehicle may have jumper terminal battery cables that are too long, or are eligible for improved routing. Battery cables that are too long may chafe against the left front suspension leaf spring, which could cause a short circuit, fire under the hood, or increased risk of crash. |
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| 32-016 | 2020-04-03. Service bulletin. EQUIPMENT. Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment damage. |
| 03-071 | 2020-01-04. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Information Only - Vehicles built with NAMUX software from 2013 to present may experience accuracy issues with the tachometer. The issue can be temporarily resolved using any one of the included procedures. |
| 19PBG | 2020-01-04. Service bulletin. POWER TRAIN. Safety Recall: Peterbilt Motors Company has determined that a defect, which relates to motor vehicle safety, may exist in certain model 348, 367, 389, 520 or 567 vehicles manufactured between November 22, 2019 and December 5, 2019. Output shafts may not have been correctly heat-treated and could break near the pinion nut. Resolution is to inspect the driveshaft to verify the julian date, and if witin th esupect date rate,, replace the output shaft. |
| 01-075 | 2019-12-04. Service bulletin. ENGINE AND ENGINE COOLING. Information Only: This bulletin provides guidance for repairing an air-conditioning system after internal failure of the A/C compressor. |
| 16-041 | 2019-10-04. Service bulletin. SUSPENSION. Non Safety Campaign: Peterbilt has determined that certain Model 365, 384, 386, 388, 389, 3895, 587 and 579 vehicles built between March 27, 2012 and January 20, 2019 with Flex Air suspension in a 6x2 configuration have U-bolts that may fail prematurely. |
| 15-028 | 2019-10-04. Service bulletin. STEERING; STEERING:COLUMN. Non Safety Campaign: Peterbilt has determined that certain model 365, 367, and 389 vehicles, built between 08/09/19 and 08/20/19 may have a steering column tilt cable that is not properly routed through a cushion clamp. This can result in contact with the U-Joint pinch bolt and damage the cable. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.