Chevrolet Silverado 2009 — technical service bulletin
Bulletin SC-11304 · NHTSA communication 10043505 · issued Jan 1, 2012
Technical service bulletin
communication type
Engine and Engine Cooling
component
2009
model years
2
vehicle entries
Official summary
Chevrolet/gmc: see document search button for owner letter. Illumination of check engine soon light may be caused by evaporative emission canister purge solenoid valve not functioning properly. *pe
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.