Chevrolet Silverado 1500 2019–2020 — technical service bulletin
Bulletin 20-NA-100 · NHTSA communication 10242265 · issued Aug 30, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2019–2020
model years
4
vehicle entries
Official summary
This informational bulletin provides information for dealers/technicians on Engine Control Module Calibration for T1 L3B Engine with DTC P26BB Set.
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.