Chevrolet Silverado 2007–2008 — technical service bulletin
Bulletin 4303 · NHTSA communication 10023744 · issued Dec 1, 2007
Technical service bulletin
communication type
Power Train
component
2007–2008
model years
9
vehicle entries
Official summary
4 wheel drive inoperative front axle will not engage - keywords clunk grind growl k2 k3 equipped with a 9.25 front differential. *nj updated 2/27/08. *nj
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.