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Service bulletins for the 2019 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.

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

By type

By component

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Bulletins, newest first
44-0302019-09-05. Service bulletin. FUEL SYSTEM, DIESEL. Fix-As-Fail - Nylon fuel lines may be too short, potentially resulting in a cracked or loose, low pressure fuel fitting at the engine or fuel tank, which may introduce air into the fuel system resulting in a hard-to-start or no-start condition.
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.
23-0032019-08-02. Service bulletin. POWER TRAIN. Fix as Fail: Vehicles with Eaton Ultrashift Plus or Fuller Advantage Automated transmissions may display fault codes and/or have clutch release problems due to broken clutch levers. Resolution is to replace the clutch.
34-0662019-07-08. Service bulletin. ELECTRICAL SYSTEM. Information Only - Quick Reference Guide for Electric harness damage repairs.
59-0022019-06-11. Service bulletin. LATCHES/LOCKS/LINKAGES; TRAILER HITCHES:FIFTH WHEEL ASSEMBLY; EQUIPMENT ADAPTIVE/MOBILITY. Non Safety Campaign: Holland Series FW17 fifth wheel handles may remain in an unlocked position when coupling to a parked trailer.
34-0712019-06-11. Service bulletin. ENGINE; EXTERIOR LIGHTING:BRAKE LIGHTS. Non-Safety Campaign: Vehicles ordered with parameter for brake lights disabled when engine brake applied were built with this feature enabled.
15-0272019-06-11. Service bulletin. STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID; EQUIPMENT ADAPTIVE/MOBILITY. Non Safety Campaign: ZF (supplier) steering gear boxes may have a sealing plug not seated corrected allowing power steering fluid loss.
34-0792019-06-10. Service bulletin. POWER TRAIN. Fix-As-Fail ? Intermittent throttle hesitation may be encountered after installing an optional PTO connector.
R18022019-05-13. Service bulletin. STRUCTURE:BODY; EQUIPMENT ADAPTIVE/MOBILITY; STRUCTURE:FRAME AND MEMBERS; EQUIPMENT. Non-Safety Campaign: Vehicles built with pre-production UltraLoft components are eligible for an upgrade to production quality components.
34-0772019-05-13. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT:ELECTRICAL. Information Only: Proper instructions for closure of power distribution box cover to prevent corrosion.
18PBC2019-03-18. Service bulletin. EXTERIOR LIGHTING; EQUIPMENT:ELECTRICAL; EQUIPMENT. Safety Recall: Vehicles fail to confirm with FMVSS/CMVSS No 108 - Table 1-a requirements for intermediate side marker lamp and reflex reflector.
13-0492019-03-18. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Information: Bendix ACOM Software version 6.16.5.0 for diagnostics may introduce an unrecoverable error. Notice to dealers to replace this version with older software version until Bendix introduces new version.
34-0732019-03-11. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Fix-As-Fail: Vehicles equipped with VECU may activate frequently when LVD is enabled. Resolution is to update the CECU software.
03-0642018-08-13. Service bulletin. ELECTRICAL SYSTEM. Information - Recommended Practices for Updating ESA Software

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