Buick Encore GX 2020–2022 — technical service bulletin
Bulletin N222372591 · NHTSA communication 10226542 · issued Nov 21, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020–2022
model years
5
vehicle entries
Official summary
Certain vehicles may have a condition in which ice or sludge can accumulate in the Charge Air Cooler (CAC) or Closed Crankcase Ventilation (CCV) system when driving in extremely cold weather conditions (-18°C (0°F) or less). Dealers will reprogram the Engine Control Module.
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.