Chevrolet Silverado 2001–2004 — technical service bulletin
Bulletin 00938B · NHTSA communication 10004179 · issued Nov 18, 2003
Technical service bulletin
communication type
Power Train
component
2001–2004
model years
8
vehicle entries
Official summary
Allison lct1000 repeat transmission control module (tcm) failures with possible multiple diagnostic trouble codes (dtcs). *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.