Chevrolet Impala (GMX 211) 2006 — technical service bulletin
Bulletin 3572A · NHTSA communication 10019435 · issued Mar 15, 2006
Technical service bulletin
communication type
Electrical System
component
2006
model years
2
vehicle entries
Official summary
Malfunction indicator lamp (mil) on, dtc(s) p0171 or p0172 set on e85 flexible fuel - drain fuel and reprogram pcm. *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.