Buick Terraza 2005–2006 — technical service bulletin
Bulletin 3332B · NHTSA communication 10017235 · issued Oct 29, 2005
Technical service bulletin
communication type
Engine and Engine Cooling
component
2005–2006
model years
14
vehicle entries
Official summary
Diagnostic trouble code p0404 egr concern. *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.