Chevrolet Silverado 2004–2005 — technical service bulletin
Bulletin 04056 · NHTSA communication 10013858 · issued Nov 16, 2004
Technical service bulletin
communication type
Wheels
component
2004–2005
model years
4
vehicle entries
Official summary
20 inch plus size wheel restriction - supplement to accessories bulletin acc04-056. Gm voicemail express. *tt
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.