Chevrolet C4500 2006 — technical service bulletin
Bulletin 3661 · NHTSA communication 10018918 · issued Jan 25, 2006
Technical service bulletin
communication type
Power Train
component
2006
model years
6
vehicle entries
Official summary
Lct1000 intermittent no drive engagement when cold. *tt
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.