Buick Lesabre 2003 — technical service bulletin
Bulletin 01347 · NHTSA communication 10004130 · issued Nov 18, 2003
Technical service bulletin
communication type
Engine and Engine Cooling
component
2003
model years
7
vehicle entries
Official summary
3.8l l37 l67 engine recommended sae viscosity grade engine oils. *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.