Chevrolet Silverado 2017–2020 — technical service bulletin
Bulletin 19NA187 · NHTSA communication 10165116 · issued Aug 23, 2019
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2020
model years
10
vehicle entries
Official summary
This bulletin provides additional information on how to graph a cylinder misfire and a possible diagnostic cause.
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.