Chevrolet Cobalt 2004–2005 — technical service bulletin
Bulletin 3393 · NHTSA communication 10017222 · issued Oct 28, 2005
Technical service bulletin
communication type
Exterior Lighting
component
2004–2005
model years
6
vehicle entries
Official summary
Backlighting is inoperative during daylight conditions (headlight switch turned on manually). *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.