Chevrolet Aveo 2004–2007 — technical service bulletin
Bulletin 050601030 · NHTSA communication 10017820 · issued Sep 1, 2007
Technical service bulletin
communication type
Engine and Engine Cooling
component
2004–2007
model years
4
vehicle entries
Official summary
1.6l l91 intermittent misfire cold during deceleration or steady state highway driving after cold start with dtc's p0300, p0700, p1781 and/or u0401 set (replace valves and valve stem seals) *tt updated 11/02/07 *nj
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.