Chevrolet Sierra 2000 — technical service bulletin
Bulletin 181000 · NHTSA communication 617645 · issued Oct 18, 2000
Technical service bulletin
communication type
Power Train
component
2000
model years
4
vehicle entries
Official summary
Engineering is investigating harsh one-two shift on the 4l60e automatic transmission. This investigation is focused on harsh one-two shifts on 2000 model year silverado and sierra equipped with 4l60e automatic transmission. *tt
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.