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Service bulletins for the 2019 Kenworth T680

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.

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

By type

By component

By trouble code

Only bulletins with component: Equipment and accessories are shown. Show all

Bulletins, newest first
51-0132022-03-04. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM. Due to major data carriers phasing out 3G networks, chassis currently utilizing first generation Peoplenet Mobile Gateway (PMG001) will experience severe 3G service degradation as early as January of 2022. Chassis currently utilizing 3G antennas as a primary antenna may experience this degradation
02-1602021-03-10. Service bulletin. VISIBILITY; EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; VISIBILITY:WINDSHIELD WIPER/WASHER. Information Only – Windshield washer pumps have a high No Trouble Found rate. Washer pumps may fail to spray due to a clogged filter.
51-0082021-02-01. Service bulletin. EQUIPMENT. T680 predictive cruise control(PCC) incompatibility with cummins engine.
26-0372021-01-06. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN; EQUIPMENT ADAPTIVE/MOBILITY. Fix-As-Fail - Prior versions of Eaton Endurant transmission software may be prone to setting Linear Clutch Actuator (LCA) fault codes leading to possible LCA hardware replacement.
26-0352021-01-06. Service bulletin. POWER TRAIN; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Non-safety campaign: Vehicles equipped with an Eaton Endurant 12 speed transmission may experience transmission service lamp activation, no gear engagement from neutral, and/or DTC 511 FMI 7 or 10 is set. Resolution is to update the transmission software and calibrations.
T0102021-01-06. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN. Non-Safety Campaign – Vehicles with PACCAR transmissions may experience transmission service lamp activation, no gear engagement from neutral, and/or DTC 511 FMI 7 or 10 is set. Transmission software and shift calibration updates are available to resolve
37-0012020-09-03. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. Fix-As-Fail – The Master Switch Module (MSM) may lose dash switch memory and functionality when the battery disconnect switch is cycled. An improved MSM is available to resolve the issue.
32-0162020-04-03. Service bulletin. EQUIPMENT. Information Only: Proper jump-starting voltage will eliminate high voltage related issues and equipment damage.
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.
A0022020-01-04. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; STRUCTURE; EQUIPMENT. Non-Safety Campaign - Chassis may experience vibration and knocking noise due to excessive wear of the rear side gear pinion teeth.
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).
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.
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.
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.
34-0772019-05-13. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT:ELECTRICAL. Information Only: Proper instructions for closure of power distribution box cover to prevent corrosion.

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