Chevrolet Sierra 1999–2005 — technical service bulletin
Bulletin 3188 · NHTSA communication 10010615 · issued Dec 2, 2004
Technical service bulletin
communication type
Suspension
component
1999–2005
model years
7
vehicle entries
Official summary
Squeak noise from rear leaf springs. *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.