Buick Century 2004 — technical service bulletin
Bulletin 030730029 · NHTSA communication 10012562 · issued Jul 1, 2003
Technical service bulletin
communication type
Power Train
component
2004
model years
13
vehicle entries
Official summary
Changes for 2004 model year for 4t65e transaxle - internal changes to valve body, spacer plate and channel plate and touch activated power (tap). *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.