Chevrolet Blazer 2019–2020 — technical service bulletin
Bulletin 21NA254 · NHTSA communication 10214215 · issued Jan 27, 2022
Technical service bulletin
communication type
Equipment Adaptive/mobility
component
2019–2020
model years
2
vehicle entries
Official summary
This technical bulletin provides a procedure to replace the Air Intake Duct assy if found the cause of the customers concern.
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.