Chevrolet Silverado 2006–2007 — technical service bulletin
Bulletin 3999 · NHTSA communication 10021076 · issued Mar 1, 2007
Technical service bulletin
communication type
Engine and Engine Cooling
component
2006–2007
model years
8
vehicle entries
Official summary
Loss of power when driving in extreme winter weather. *kb
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.