Chevrolet Silverado 2001–2005 — technical service bulletin
Bulletin 30559 · NHTSA communication 10009674 · issued Jan 1, 2004
Technical service bulletin
communication type
Power Train
component
2001–2005
model years
10
vehicle entries
Official summary
Allison lct1000 diagnostic trouble code p1711, p0872 after completing repairs. *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.