Chevrolet TSB #080730026F
2020 Chevrolet Sonic
Affected Component: POWER TRAIN:AUTOMATIC TRANSMISSION
- This informational bulletin provides information on Some vehicles may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.