Buick Terraza 2005 — technical service bulletin
Bulletin 3688 · NHTSA communication 10019449 · issued Mar 15, 2006
Technical service bulletin
communication type
Engine and Engine Cooling
component
2005
model years
4
vehicle entries
Official summary
Rear main oil seal leak. *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.