Chevrolet Express 2011–2013 — technical service bulletin
Bulletin PI-0845 · NHTSA communication 10047820 · issued Oct 1, 2012
Technical service bulletin
communication type
Engine and Engine Cooling
component
2011–2013
model years
10
vehicle entries
Official summary
Gmc/chevrolet: there may be an accumulation of diesel particulate filter soot level found when a diagnostic system check is performed and may be caused by engine control module (ecm) with a reduced engine power message. Model 2011-2013 express, silverado; savana, sierra. *pe
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.