Chevrolet Silverado 1999–2004 — technical service bulletin
Bulletin 020605003C · NHTSA communication 10002939 · issued Feb 1, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
1999–2004
model years
12
vehicle entries
Official summary
Exhaust moan/vibration. *tt update. *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.