Chevrolet Silverado 2011–2012 — technical service bulletin
Bulletin PI0689B · NHTSA communication 10113485 · issued Aug 6, 2013
Technical service bulletin
communication type
Equipment Adaptive/mobility
component
2011–2012
model years
4
vehicle entries
Official summary
This preliminary information bulletin provides a procedure for installing a aftermarket tool or utility box.
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.