Chevrolet Silverado 2004–2005 — technical service bulletin
Bulletin 050604063 · NHTSA communication 10017760 · issued Oct 1, 2005
Technical service bulletin
communication type
Engine and Engine Cooling
component
2004–2005
model years
10
vehicle entries
Official summary
Lm7, l59 or l33 engines with cold start rough or incorrect idle, misfire, malfunction indicator lamp (mil) or flashing requiring o2 sensor replacement. *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.