Chevrolet Silverado 2500 2022 — technical service bulletin
Bulletin N212351211 · NHTSA communication 10232696 · issued Mar 7, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2022
model years
4
vehicle entries
Official summary
General Motors has decided to conduct a voluntary emissions recall involving certain vehicles, equipped with a diesel engine. The Engine Control Module (ECM) may not properly detect faults, set DTCs or illuminate the Malfunction Indicator Light (Check Engine Light) if these fault conditions occur: â ¢Charge Air Cooler (CAC) low efficiency (DTC P026A) â ¢Exhaust Gas Recirculation (EGR) cooler low efficiency (DTC P2457) â ¢NOx sensor position 1 slow response (DTC P22F9) Dealers are to reprogram the Engine Control Module (ECM) with corrected software.
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.