Chevrolet Trailblazer 2004–2005 — technical service bulletin
Bulletin PIP3330D · NHTSA communication 10160997 · issued May 9, 2019
Technical service bulletin
communication type
Power Train
component
2004–2005
model years
5
vehicle entries
Official summary
This Preliminary Information Document advises the dealer that there is a software update available for the Powertrain Control Module to address diagnostic trouble code P0171. If the software update does not correct the condition, the dociment directs the dealer to related technical servce bulletins that cover cleaning fuel injectors and addressing fuel quality.
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.