Chevrolet Express 2003 — technical service bulletin
Bulletin 3491 · NHTSA communication 10014878 · issued May 11, 2005
Technical service bulletin
communication type
Service Brakes, Hydraulic
component
2003
model years
4
vehicle entries
Official summary
Anti-lock braking system (abs) telltale illuminated with diagnostic trouble code c0550. *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.