Chevrolet Silverado 1999–2002 — technical service bulletin
Bulletin 030602 · NHTSA communication 637176 · issued Jun 3, 2002
Technical service bulletin
communication type
Fuel System, Gasoline
component
1999–2002
model years
8
vehicle entries
Official summary
Some vehicles may display a diagnostic trouble code of p0446 (evap canister vent). *tt
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.