Pontiac Gto 2004 — technical service bulletin
Bulletin 040604016 · NHTSA communication 10008671 · issued Mar 1, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
2004
model years
1
vehicle entries
Official summary
Revised diagnostic trouble code (dtc) p0135, p0141, p0155, or p0161 heater performance and revised dtc p0140, p0160, p0134, p0154 ho2s insufficient activity. *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.