Chevrolet Colorado 2004–2005 — technical service bulletin
Bulletin 3308A · NHTSA communication 10017189 · issued Oct 27, 2005
Technical service bulletin
communication type
Power Train
component
2004–2005
model years
4
vehicle entries
Official summary
Possible no 4wd shift concern diagnostic trouble code c0327. *tt
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.