Chevrolet Avalanche 2002 — technical service bulletin
Bulletin 030730005 · NHTSA communication 10001115 · issued Feb 1, 2003
Technical service bulletin
communication type
Power Train
component
2002
model years
7
vehicle entries
Official summary
Service engine soon indicator illuminated, transmission slips, engine flare, delayed 2-3 shift, shifts missing, no shift, diagnostic trouble codes p0730, p0756, p0757. *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.