Chevrolet Silverado 2012 — technical service bulletin
Bulletin SB-12118 · NHTSA communication 10045041 · issued Jun 1, 2012
Technical service bulletin
communication type
Engine
component
2012
model years
2
vehicle entries
Official summary
Gmc/chevrolet: if not torqued to specification, on certain trucks, bolts on 4 water pump pulley, could back out or break. *pe
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.