Chevrolet Silverado 1500 2004–2007 — technical service bulletin
Bulletin PIT4780M · NHTSA communication 10247670 · issued Apr 1, 2013
Technical service bulletin
communication type
Electrical System
component
2004–2007
model years
8
vehicle entries
Official summary
Parallel Hybrid Truck (PHT) Part Restriction.
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.