Service bulletins for the 2020 Kenworth W990
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.
53 on file from NHTSA, as of 2026-10-19.
By type
By component
By topic
| 42-058 | 2019-09-05. Service bulletin. ENGINE AND ENGINE COOLING. Fix-As-Fail: Two separate causes have been identified as root cause of intermittent low coolant indicator illumination. |
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| 34-077 | 2019-05-13. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT:ELECTRICAL. Information Only: Proper instructions for closure of power distribution box cover to prevent corrosion. |
| TIB34-073 | 2019-03-11. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. Fix-As-Fail: Vehicles equipped with VECU may activate frequently when LVD is enabled. Resolution is to update the CECU software. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.