GM
Type:
    Network - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    CAN Bus Off (4L30-E Transmission) Conditions
Cause:
    Key on and the TCM detected a loss of communication on either Communication Area Network (CAN) Bus line for one second

GM
Type:
    Network - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    CAN Bus Off (4L30-E Transmission) Conditions
Cause:
    Key on and the TCM detected a loss of communication on either Communication Area Network (CAN) Bus line for one second