Chevrolet Silverado 2001–2007 — technical service bulletin
Bulletin 4144 · NHTSA communication 10022360 · issued Aug 3, 2007
Technical service bulletin
communication type
Power Train
component
2001–2007
model years
18
vehicle entries
Official summary
Allison lct1000 harsh 3-2, 2-1 downshift, and abs may activate. *kb
Vehicles covered
- 2001 Chevrolet Silverado
- 2002 Chevrolet Silverado
- 2003 Chevrolet Silverado
- 2004 Chevrolet Silverado
- 2005 Chevrolet Silverado
- 2006 Chevrolet Silverado
- 2007 Chevrolet Silverado 1500
- 2007 Chevrolet Silverado 2500
- 2007 Chevrolet Silverado 3500
- 2001 GMC Sierra
- 2002 GMC Sierra
- 2003 GMC Sierra
- 2004 GMC Sierra
- 2005 GMC Sierra
- 2006 GMC Sierra
- 2007 GMC Sierra 1500
- 2007 GMC Sierra 2500
- 2007 GMC Sierra 3500
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.