Chevrolet Avalanche 2003–2008 — technical service bulletin
Bulletin PIT5141B · NHTSA communication 10043918 · issued Apr 1, 2012
Technical service bulletin
communication type
Visibility
component
2003–2008
model years
9
vehicle entries
Official summary
Gm: blower inoperative after control module replacement. This may occur if the speed is set to any speed position, except for low, when the key is turned off. Upon nest key up, the blower motor may be inoperative. Also included model chevrolet trailblazer xl model years 2003-2007. *js
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.