Chevrolet Express 2003–2004 — technical service bulletin
Bulletin 3320 · NHTSA communication 10013536 · issued Apr 21, 2005
Technical service bulletin
communication type
Suspension
component
2003–2004
model years
4
vehicle entries
Official summary
Clunk pop noise in the front suspension over bumps. *tt
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.