Buick Lesabre 2004 — technical service bulletin
Bulletin 11052003 · NHTSA communication 10013138 · issued Nov 5, 2003
Technical service bulletin
communication type
Fuel System, Other
component
2004
model years
7
vehicle entries
Official summary
Diagnostic trouble codes p0440 and p0455, along with a loose fuel cap message displayed on the dic on vehicles with 3800 engine applications. *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.