Chevrolet Silverado 2017–2020 — technical service bulletin
Bulletin 17NA374 · NHTSA communication 10163222 · issued Jun 27, 2019
Technical service bulletin
communication type
Engine
component
2017–2020
model years
11
vehicle entries
Official summary
This informational bulletin advises the technician of how the Soot information has changed from grams to percentage.
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.