GMC Sierra 2016–2018 — technical service bulletin
Bulletin PIE0380B · NHTSA communication 10134601 · issued Oct 5, 2017
Technical service bulletin
communication type
Exterior Lighting
component
2016–2018
model years
5
vehicle entries
Official summary
This engineering informational bulletin is requesting information from the field on vehicles that have the condition of Both Front Low Beam, High Beam, Day Time Running Lamps (DRL) and Turn Signals Inoperative.
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.