Chevrolet Trailblazer 2002–2005 — technical service bulletin
Bulletin 020309002B · NHTSA communication 10005147 · issued Dec 1, 2004
Technical service bulletin
communication type
Suspension
component
2002–2005
model years
10
vehicle entries
Official summary
Intermittent boom, rumbling noise and / or disturbance heard in passenger compartment while driving at highway speeds. *tt
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.