Chevrolet Silverado 2001–2003 — technical service bulletin
Bulletin 00252B · NHTSA communication 10005507 · issued Jan 1, 2004
Technical service bulletin
communication type
Power Train
component
2001–2003
model years
6
vehicle entries
Official summary
Allison lct1000 knock noise and possible leak from the torque converter area. Sit bulletin 1401124. *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.