Gm: loss of high speed gmlan communications, intermittent no crank, ip gage fluctuation, intermittent door...

Bulletin number

08-07-30-021G

Component

Power train: automatic transmission: control module (TCM/PCM/tecm)

Summary

Gm: loss of high speed gmlan communications, intermittent no crank, ip gage fluctuation, intermittent door look cycling, intermittent chime operation, various ip warning lamps illuminated, transmission may not shift, communication dtcs u0073, u0100, u0101, u0102 u0121 or u0140 set (repair terminals in transmission harness connector, repair open or shorted gm high speed lan circuits, open or shorted data link resistor, corrosion or poor connections in various control module connectors). Js

Owners of these vehicles have filed 420 complaints in the transmission category.