Chevrolet Sierra 2001 — technical service bulletin
Bulletin 020401 · NHTSA communication 619402 · issued Apr 2, 2001
Technical service bulletin
communication type
Power Train
component
2001
model years
4
vehicle entries
Official summary
Some customers have commented that when in four-wheel drive and in reverse gear engine speed will not go over 1,000 to 1,300 rpms. *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.