Chevrolet Silverado 1999–2006 — technical service bulletin
Bulletin 3156 · NHTSA communication 10010292 · issued Nov 10, 2004
Technical service bulletin
communication type
Power Train
component
1999–2006
model years
16
vehicle entries
Official summary
261 transfer case drivelines growl 1100-1200 rpm. *tt
Vehicles covered
- 1999 Chevrolet Silverado
- 2000 Chevrolet Silverado
- 2001 Chevrolet Silverado
- 2002 Chevrolet Silverado
- 2003 Chevrolet Silverado
- 2004 Chevrolet Silverado
- 2005 Chevrolet Silverado
- 2006 Chevrolet Silverado
- 1999 GMC Sierra
- 2000 GMC Sierra
- 2001 GMC Sierra
- 2002 GMC Sierra
- 2003 GMC Sierra
- 2004 GMC Sierra
- 2005 GMC Sierra
- 2006 GMC Sierra
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.