Chevrolet Silverado 2004 — technical service bulletin
Bulletin 3322 · NHTSA communication 10017196 · issued Oct 28, 2005
Technical service bulletin
communication type
Engine and Engine Cooling
component
2004
model years
5
vehicle entries
Official summary
Incorrect o2 sensors and wiring harness causing ho2 sensor heater circuit codes p0135 p0141 p0155 p0161. *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.