Chevrolet Colorado 2004–2005 — technical service bulletin
Bulletin 3145 · NHTSA communication 10010251 · issued Nov 8, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
2004–2005
model years
4
vehicle entries
Official summary
Service engine soon light due to a p0171 diagnostic trouble code. *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.