Chevrolet Silverado 2017–2020 — technical service bulletin
Bulletin 18NA098 · NHTSA communication 10163225 · issued Jun 24, 2019
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2020
model years
11
vehicle entries
Official summary
This informational bulletin provides information for the technicians on where to look on the Duramax engine for coolant leaks.
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.