Result:

p0771

Generic
Type:
    Powertrain - Transmission - ISO/SAE Controlled
Description:
    Shift Solenoid "E" Performance/Stuck Off

GM
Type:
    Powertrain - Transmission - ISO/SAE Controlled
Description:
    Lockup Solenoid (MS7 4-Speed Transaxle)
Cause:
    Engine running, vehicle at cruise speed in Drive then the PCM detected that TCC Lockup did not occur after it was commanded on or that TCC remained in lockup after it was commanded off

Look for code