Buick Lesabre 1995–1997 — technical service bulletin
Bulletin 731207 · NHTSA communication 52603 · issued Mar 1, 1997
Technical service bulletin
communication type
Equipment
component
1995–1997
model years
13
vehicle entries
Official summary
Intermittent a/c system thump noise on initial start up from front passenger side floor panel (replace accumulator). *tw
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.