Chevrolet Silverado 2001 — technical service bulletin
Bulletin 040604042 · NHTSA communication 10012162 · issued Jun 1, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
2001
model years
6
vehicle entries
Official summary
Revised diagnostic system check - engine controls. *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.