Buick Lucerne 2006–2011 — technical service bulletin
Bulletin 120604003 · NHTSA communication 10246601 · issued Dec 1, 2012
Technical service bulletin
communication type
Power Train
component
2006–2011
model years
15
vehicle entries
Official summary
Diagnosis and Repair - Malfunction Indicator Lamp (MIL) Illuminated, Reduced Engine Power Message Displayed, DTC P2135 Set
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.