Chevrolet Silverado 2003 — technical service bulletin
Bulletin 3125 · NHTSA communication 10009959 · issued Jan 1, 2004
Technical service bulletin
communication type
Fuel System, Diesel
component
2003
model years
2
vehicle entries
Official summary
Duramax diesel low power and fuel economy. *tc
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.