Chevrolet Impala 2004–2005 — technical service bulletin
Bulletin 070139002 · NHTSA communication 10023213 · issued Sep 1, 2007
Technical service bulletin
communication type
Equipment
component
2004–2005
model years
4
vehicle entries
Official summary
Ei07091 - a/c not cold enough, hvac mode doesn't change, heat not hot enough, b0409, b0419, b0269, b0249, b0408, b0268, b0418, b0248, b0414, b3749, b0424, b3748 (actuator diagnosis) *nj
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.