Chevrolet Silverado 2001–2005 — technical service bulletin
Bulletin 3225A · NHTSA communication 10017137 · issued Oct 26, 2005
Technical service bulletin
communication type
Engine and Engine Cooling
component
2001–2005
model years
10
vehicle entries
Official summary
01-05 6.6 lly lb7 duramax diesel engine air filter usage. *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.