Chevrolet Express 2011–2013 — technical service bulletin
Bulletin PIP5110A · NHTSA communication 10112995 · issued Apr 22, 2013
Technical service bulletin
communication type
Engine and Engine Cooling
component
2011–2013
model years
15
vehicle entries
Official summary
This Preliminary Information communication provides information to the technician of additional information while diagnosing a diagnostic trouble code P0420. Check for a possible leak in the exhaust system behind the bank one number 2 oxygen sensor. If a leak is found or there is an aftermarket utility bed or trailer hitch installed. Check for a minimum clearance of 1.5 to 2 inches of the exhaust system.
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.