Chevrolet Silverado 2003–2004 — technical service bulletin
Bulletin 3556 · NHTSA communication 10016942 · issued Oct 18, 2005
Technical service bulletin
communication type
Engine and Engine Cooling
component
2003–2004
model years
12
vehicle entries
Official summary
Hard start or extended crank time on initial cold start when using alcohol blended fuels. *sc
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.