Chevrolet Silverado 1500 2014–2015 — technical service bulletin
Bulletin 140604004 · NHTSA communication 10246496 · issued Mar 1, 2014
Technical service bulletin
communication type
Back Over Prevention
component
2014–2015
model years
10
vehicle entries
Official summary
Various Engine Noises During Cold Start and Warm Engine Operation
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.