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Service bulletins for the 2020 Peterbilt 579

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.

105 on file from NHTSA, as of 2026-10-19.

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Bulletins, newest first
02-1582020-09-03. Service bulletin. EQUIPMENT; STRUCTURE; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Fix as Fail: Peterbilt has determined that certain model 348, 365, 367, 382, 384, 386, 388, 389, 567, 579, and 587 trucks, built between 4/13/2010 and 3/16/2020 and equipped with a flush mounted battery box, utilized rubber washers that could rub through and cause the aluminum box mounting tabs to rub directly on the steel frame brackets. This could result in cracked battery box mounting angles. Resolution is to add the reinforcement bracket(s) to affected vehicles.
13-0542020-08-05. Service bulletin. SERVICE BRAKES. Fix-As-Fail - Bendix New-Gen Lightweight Steer Axle Drum Brake Spider Cracking
32-0152020-07-03. Service bulletin. ELECTRICAL SYSTEM. Information Only: This bulletin provides dealers with a battery warranty quick reference guide to ensure the appropriate tests for battery warranty are performed in order to prevent battery warranty claims filed with incorrect or incomplete information.
43-0672020-07-03. Service bulletin. STRUCTURE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Fix as Fail: For all conventional models, except 387/587, equipped with Side-of-Cab (“SOC”) exhaust and built from 03/6/2006 to 1/20/2020, the clamps that secure the SOC exhaust stacks may not be tightened properly. This may allow the exhaust stack to rotate and contact the cab or sleeper.
11-0012020-06-02. Service bulletin. POWER TRAIN. Information only: Hendrickson Softek front axle maintenance intervals and requirements.
20PBA2020-05-06. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ELECTRICAL SYSTEM. "Safety Recall: NHTSA recall number is 20V130. 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 March 09, 2020 with a left-hand under hood jumper start terminal. Jumper terminal battery cables may be too long, or 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. "
20PBA2020-04-03. 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.
34-0862020-04-03. Service bulletin. ELECTRICAL SYSTEM. Fix as Fail: Peterbilt has determined in model 567 and 579 vehicles built after 2011, the door harnesses may fail due to repeated door open and close cycles. Resolution is to replace the door harness with a more robust designed harness if a failure is experienced.
32-0162020-04-03. Service bulletin. EQUIPMENT. Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment damage.
02-1572020-04-03. Service bulletin. VISIBILITY. Fix as Fail: Certain model 567 and 579 vehicles may have been built with a windshield seal that could delaminate. Vehicles built from 9/27/2019 through 2/06/2020 with windshield Julian date codes between 263 of 2019 and 031 of 2020 could be affected. Resolution is to replace any failed windshields with a delaminated seal.
32-0132020-02-05. Service bulletin. ELECTRICAL SYSTEM. Information Only: The AutoStart System Test does not recognize the hood opening and closing when running the test on a model 579 or 567 chassis equipped with a VECU software version 9.8 and 9.9. The issue will be fixed on a future VECU software update. This bulletin will be updated when the resolution is available.
03-0712020-01-04. 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.
01-0782020-01-04. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Fix as Fail: Peterbilt has determined that certain models 567 and 579 vehicles built after January 01, 2013 with an Espar fuel fire heater and SmartAir may have an auto On/Off malfunction at lower temperatures. User may experience lack of heat function on SmartAir if the set temperature is < 76 °F. Resolution is to install a jumper harness.
01-0772020-01-04. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Fix as Fail: Peterbilt has determined that model 567 and 579 vehicles built after January 01, 2013 and equipped with Espar fuel fire heater and SmartAir may have temperature overshoot issue. User may experience higher sleeper interior temperature than the set temperature on the SmartAir control. Resolution is to install an additional external temperature sensor on the sleeper control panel.
52-0022020-01-04. Service bulletin. EQUIPMENT. Fix-As-Fail - DEA5XX radio may be locked in the ON position or stuck in hi volume. A software update is available to resolve this issue.
19PBE2019-12-04. Service bulletin. EQUIPMENT. Safety Recall: A regulatory non-compliance, may exist in certain model 579 vehicles manufactured between 8/26/2019 and 9/12/2019. On certain trucks, the reflective conspicuity tape on the back wall of the sleeper box was installed in incorrect locations. FMVSS 108 Section S8 2.4.2 regulations require the conspicuity tape to be placed in specific areas. A truck that does not have properly placed conspicuity tape may be less visible to others and could create an increased risk of a crash. Vehicles operating without a trailer may be cited for incorrect tape location and fail an annual truck inspection. REsolution is to inspect the location of the back of sleeper reflective tape, and apply in the proper location if required.
01-0752019-12-04. 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.
26-0342019-10-04. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Fix as Fail: Certain model 579 and 567 vehicles equipped with Eaton Endurant or PACCAR AMT transmissions, built between 5/01/2017 and 4/07/2019, may have a fluid pressure sensor rubbing or experiencing hard interference with routing brackets, power cables, wiring harnesses, or air lines in the driver’s side frame rail.
16-0412019-10-04. 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.
TIB43-0622019-10-04. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Information Only – This bulletin provides information about the California Air Resources Board (CARB) Periodic Smoke Inspection Program (PSIP) and Heavy Duty Vehicle Inspection Program (HDVIP).
34-0822019-09-05. Service bulletin. ELECTRICAL SYSTEM. Fix as Fail Vehicles are susceptible to noise interference due to an incorrect V-Can wiring in the roof harness. A procedure for installing a V-CAN overlay will correct this issue.
02-1502019-09-05. Service bulletin. STRUCTURE. Fix as Fail Vehicles equipped with chassis fairings may have battery box openings that allow debris to enter the box. A battery box closeout has been designed and when installed will prevent debris from entering the battery box.
42-0562019-09-05. Service bulletin. ENGINE AND ENGINE COOLING. Fix-As-Fail -“ Composite fittings used in the cooling system may crack, resulting in coolant leaks. Brass fittings are available to replace the composite fittings.
42-0582019-09-05. Service bulletin. ENGINE AND ENGINE COOLING. Fix-As-Fail: Two separate causes have been identified as root cause of intermittent low coolant indicator illumination.
01-0732019-09-05. Service bulletin. EQUIPMENT; EQUIPMENT:APPLIANCE:AIR CONDITIONER. Fix as Fail HVAC system may demonstrate inadequate temperature control, be stuck in defrost mode, or have intermittent changes in fan speed that can be remedied with an updated HVAC software.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.