Buick Rainier 2002–2005 — technical service bulletin
Bulletin 3138 · NHTSA communication 10011821 · issued Feb 1, 2005
Technical service bulletin
communication type
Power Train
component
2002–2005
model years
12
vehicle entries
Official summary
Reduced power light on and diagnostic trouble code p1680 p1221 and or p1271 stored in the powertrain control module. *eh
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.