Chevrolet Cobalt 2004–2006 — technical service bulletin
Bulletin 3492 · NHTSA communication 10017021 · issued Oct 21, 2005
Technical service bulletin
communication type
Electrical System
component
2004–2006
model years
5
vehicle entries
Official summary
Service engine soon (ses) light at highway speeds due to a p0171 diagnostic trouble code (dtc). *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.