Chevrolet Express 2000–2001 — technical service bulletin
Bulletin 3047 · NHTSA communication 10010185 · issued Jan 1, 2004
Technical service bulletin
communication type
Power Train
component
2000–2001
model years
13
vehicle entries
Official summary
00-01 4l80-e automatic transmission may experience a harsh tcc apply and/or diagnostic trouble code p1870 or p074. *tc
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.