Buick Rainier 2002–2004 — technical service bulletin
Bulletin 050604014 · NHTSA communication 10014993 · issued Mar 1, 2005
Technical service bulletin
communication type
Engine and Engine Cooling
component
2002–2004
model years
10
vehicle entries
Official summary
Diagnostic aids for diagnostic trouble codes p0440, p0455 and/or p0442 - evaporative emission (evap) system leak. *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.