Chevrolet Express 2019–2020 — technical service bulletin
Bulletin PIP5630D · NHTSA communication 10178334 · issued Jun 17, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2019–2020
model years
11
vehicle entries
Official summary
This Preliminary information communicates A vehicle may have a concern of no oil pressure and/or P0521 set. the releif valve in the pump is sticking or the number 1 main bearing is damaged. Drop oil pan and confirm #1 main is spun or not. If bearings are OK Then change oil pump.
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.