Chevrolet Silverado 2001–2004 — technical service bulletin
Bulletin 01495 · NHTSA communication 10005511 · issued Jan 1, 2004
Technical service bulletin
communication type
Fuel System, Diesel
component
2001–2004
model years
8
vehicle entries
Official summary
Duramax diesel fuel in oil diagnostics. Service vme. Lb7 6.6l engine. Sit bulletin 1401353. Various models including 2003 and 2004 gmc c4500 and 5500 trucks. *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.