Chevrolet Silverado 2001–2002 — technical service bulletin
Bulletin 221001 · NHTSA communication 628016 · issued Oct 22, 2001
Technical service bulletin
communication type
Fuel System, Gasoline
component
2001–2002
model years
4
vehicle entries
Official summary
Some 2500 hd 3500 series trucks with the 6600 duramax ld7 engine may exhibit a fuel pressure sensor leak at the function block. *tt
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.