Chevrolet Silverado 2011–2012 — technical service bulletin
Bulletin PI0699 · NHTSA communication 10043893 · issued Aug 1, 2015
Technical service bulletin
communication type
Engine and Engine Cooling
component
2011–2012
model years
4
vehicle entries
Official summary
Gm: gauge fluctuation, various dtcs, and the wiring harness may be chafing/rubbing on a/c line. *js updated 5/22/12. *js updated 2/5/16. *pe
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.