GM
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Torque Converter Overstressed (4T80-E Transmission)
Cause:
    DTC P0121, P0122, P0123, P0502, P0503, P1820, P1822, P1823 and P1825 not set, Transmission not in P/N, VSS input at 5 mph or less, TCC slip speed over 1500 rpm, then the PCM detected that the throttle angle was 79% or greater for 12 seconds in the test.