Chevrolet Cavalier 2002 — technical service bulletin
Bulletin 040604021 · NHTSA communication 10012584 · issued Apr 1, 2004
Technical service bulletin
communication type
Power Train
component
2002
model years
1
vehicle entries
Official summary
Powertrain control module (pcm) will not properly communicate certain on-board diagnostic test result information with non-tech2 (generic) service or test equipment. *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.