Chevrolet Express 2007–2008 — technical service bulletin
Bulletin PIP-4380 · NHTSA communication 10026108 · issued Jul 1, 2008
Technical service bulletin
communication type
Engine and Engine Cooling
component
2007–2008
model years
12
vehicle entries
Official summary
Gmc: egr low flow dtc p0401. Vehicles that are equipped with the 6.6l diesel engine rpo code lm. *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.