GMC Sierra 2003–2004 — technical service bulletin
Bulletin 3039 · NHTSA communication 10009635 · issued Jan 1, 2004
Technical service bulletin
communication type
Equipment
component
2003–2004
model years
6
vehicle entries
Official summary
Auto volume inoperative after ignition key is cycled. Various models including 03-04 cadillac all full size utilities. *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.