Chevrolet Express 2017–2018 — technical service bulletin
Bulletin PIP5522C · NHTSA communication 10164773 · issued Aug 20, 2019
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2018
model years
8
vehicle entries
Official summary
This Preliminary information communicates A vehicle may have a concern of engine noise and/or a misfire. This may be caused by a broken rocker arm. A broken rocker arms that could result in the valve dropping to the cylinder, causing a catastrophic failure and the engine requires replacement due to cylinder head and block damage. If a broken rocker arm is found check to see if the valve dropped into the cylinder if so the engine will need to be replaced. On occasions the valve will not drop, reinstall any valve keepers and replace all the intake rocker arms.
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.