Chevrolet Trailblazer 2002 — technical service bulletin
Bulletin 010604052A · NHTSA communication 10005146 · issued May 1, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
2002
model years
3
vehicle entries
Official summary
On-board diagnostic (obd) system improvements - service engine soon light on, diagnostic trouble code (dtc) p0014, p0116, or p1683 set, delayed transmission downshift and/or excessive fan noise. *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.