Chevrolet Colorado 2023–2024 — technical service bulletin
Bulletin N242452131-02 · NHTSA communication 11037312 · issued Sep 11, 2026
Technical service bulletin
communication type
Fuel/propulsion System
component
2023–2024
model years
8
vehicle entries
Official summary
Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall involving certain 2023-2024 model year Chevrolet Colorado / Silverado 1500 and GMC Canyon / Sierra 1500 vehicles equipped with a 2.7L engine (RPO L3B). The Engine Control Module (ECM) may not sufficiently control fuel injector flow rate under certain driving conditions. 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.