Chevrolet Silverado 3500 2006–2007 — technical service bulletin
Bulletin 4421 · NHTSA communication 10022363 · issued Aug 3, 2007
Technical service bulletin
communication type
Suspension
component
2006–2007
model years
4
vehicle entries
Official summary
Rear axle hop during aggressive braking. *kb
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.