Chevrolet Avalanche 2005 — technical service bulletin
Bulletin 3479C · NHTSA communication 10016536 · issued Sep 21, 2005
Technical service bulletin
communication type
Engine and Engine Cooling
component
2005
model years
7
vehicle entries
Official summary
Engine knock noise heard at all times. *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.