Buick Lesabre 2002 — technical service bulletin
Bulletin 040604023 · NHTSA communication 10012596 · issued Apr 1, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
2002
model years
7
vehicle entries
Official summary
Powertrain control module will not properly communicate on board diagnostic egr test result information to non-tech2 service or test equipment. *eh
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.