Chevrolet Silverado 2015–2016 — technical service bulletin
Bulletin PI-1522 · NHTSA communication 10059176 · issued Aug 1, 2015
Technical service bulletin
communication type
Power Train
component
2015–2016
model years
4
vehicle entries
Official summary
Gmc/chevrolet: due to interference with engine accessory drive belt from transmission control module (tcm) wire harness routing, the wire harness will be damaged and have poor transmission performance and quality shifting and malfunction indicator lamp (mil) on. *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.