Chevrolet Silverado 2001–2002 — technical service bulletin
Bulletin 01406 · NHTSA communication 10004210 · issued Nov 18, 2003
Technical service bulletin
communication type
Electrical System
component
2001–2002
model years
4
vehicle entries
Official summary
6.6l lb7 duramax diesel diagnostic trouble codes (dtcs) p0201-p0208. 2500 hd and 3500 models. *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.