Chevrolet Avalanche 2003 — technical service bulletin
Bulletin 00559B · NHTSA communication 10004265 · issued Nov 18, 2003
Technical service bulletin
communication type
Power Train
component
2003
model years
5
vehicle entries
Official summary
4l80e/4l85e may set a diagnostic trouble code (dtc) p0706 (transmission range switch performance) and exhibit a no start condition. *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.