Chevrolet Silverado 2003 — technical service bulletin
Bulletin 01597 · NHTSA communication 10007177 · issued Jan 1, 2004
Technical service bulletin
communication type
Equipment
component
2003
model years
2
vehicle entries
Official summary
Blower motor operates on high only.*mr
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.