Chevrolet Silverado 1500 2007 — technical service bulletin
Bulletin 4389 · NHTSA communication 10021692 · issued Jun 15, 2007
Technical service bulletin
communication type
Trailer Hitches
component
2007
model years
6
vehicle entries
Official summary
Trailer hitch insert - product update. *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.