Chevrolet Silverado 2015–2018 — technical service bulletin
Bulletin 18NA001 · NHTSA communication 10137274 · issued Jan 4, 2018
Technical service bulletin
communication type
Exterior Lighting
component
2015–2018
model years
11
vehicle entries
Official summary
This informational bulletin explains normal operation of HID bulbs when driving over road irregularities.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.