Chevrolet Silverado 1500 2019 — technical service bulletin
Bulletin N232412710 · NHTSA communication 10239710 · issued Jul 27, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2019
model years
2
vehicle entries
Official summary
Emissions Recall. General Motors has decided to conduct a Voluntary Emission Recall involving certain vehicles with a 2.7L engine (RPO L3B). The Engine Control Module (ECM) may not properly diagnose, may not set Diagnostic Trouble Codes (DTCs) or may not illuminate the Malfunction Indicator Light (Check Engine Light) if certain fault conditions of the catalytic converter were to occur. Dealers are to reprogram the ECM.
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.