Chevrolet Trailblazer 2002 — technical service bulletin
Bulletin 050138001 · NHTSA communication 10013447 · issued Jan 1, 2005
Technical service bulletin
communication type
Equipment
component
2002
model years
3
vehicle entries
Official summary
New essential tool for hvac mode door actuator replacement. *eh
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.