Chevrolet Silverado 2017–2018 — technical service bulletin
Bulletin 18NA006 · NHTSA communication 10139245 · issued Jan 25, 2018
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2018
model years
5
vehicle entries
Official summary
The technical bulletin provides a procedure for inspecting and performing a cooling system purge if the cooling system has been found low on coolant.
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.