Buick Lesabre 1996–1997 — technical service bulletin
Bulletin 631218 · NHTSA communication 51240 · issued Jan 1, 1997
Technical service bulletin
communication type
Equipment
component
1996–1997
model years
8
vehicle entries
Official summary
A/c system flutter and/or moan noise with hvac in a/c modes. *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.