Chevrolet Silverado 2003–2004 — technical service bulletin
Bulletin 040525005A · NHTSA communication 10012587 · issued Oct 1, 2004
Technical service bulletin
communication type
Service Brakes, Air
component
2003–2004
model years
4
vehicle entries
Official summary
Antilock brake system light on service brake system message on driver information center. *eh updated *eh
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.