Chevrolet Silverado 2005 — technical service bulletin
Bulletin 040601027 · NHTSA communication 10010192 · issued Oct 1, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
2005
model years
3
vehicle entries
Official summary
Mis-machined engine oil gallery - inspect/replace engine. Various 2005 models inclding chevrolet express. *nm actual service bulletin. *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.