Took my car to the dealership, Jesus Cruz, from Maroone Chevrolet Miami, took care of the issue and quickly identified it to be the torque converter clutch (TCC)
#PI0700A (Document ID: 2838546) Shudder Feel While Driving in 40-50 MPH Range - (Apr 30, 2012)
Models:
- 2012 Cadillac CTS
- 2012 Chevrolet Camaro
Equiped with 3.0L or 3.6L Engine (RPO LFW, LFX) and 6L45 or 6L50
Automatic Transmission (RPO MYA, MYB)
Hope this helps someone.