Chevrolet Cobalt 2004–2006 — technical service bulletin
Bulletin 060604033 · NHTSA communication 10020838 · issued Jun 1, 2006
Technical service bulletin
communication type
Engine and Engine Cooling
component
2004–2006
model years
9
vehicle entries
Official summary
Engine malfunction indicator lamp (mil)/service engine soon (ses) lamp illuminated with dtc p0171. *kb
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.