Buick Lesabre 1998 — technical service bulletin
Bulletin 990730007 · NHTSA communication 607351 · issued May 1, 1999
Technical service bulletin
communication type
Power Train
component
1998
model years
4
vehicle entries
Official summary
Vehicles with hydra-matic transaxle may exhibit vehicle shudder when reapplying throttle (greater than 50%) after stopping. *tt
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.