Chevrolet Silverado 2017–2018 — technical service bulletin
Bulletin 17NA374 · NHTSA communication 10137432 · issued Mar 21, 2018
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2018
model years
6
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.