For warrenty purposes, are transmission mounts considered part of the drive train?
Are they under warrenty generally?
Car is 2007 Aveo 5.
AFAIK no.
they should be under the “bumper-to-bumper” warranty, whatever it is for your particular car.
Even the weakest definition of drive train would include the transmission/transaxle.
Read the book that came with the vehicle. As with anything, abuse would not be covered. A burned clutch in a stick would not be covered except maybe at extremely low mileage.
You can check the complete coverage here:
Covered for 100,000 Miles/5 years*
Chevrolet will warrant each 2007 through 2011 model year Chevrolet passenger car, light-duty truck, crossover or van for 100,000 miles/160,000 kilometers or 5 years (whichever comes first; see dealer for details) with no deductible, from the original in-service date of the vehicle, for warrantable repairs that are required as a result of defects due to material and/or workmanship to the powertrain components as listed below:
This includes the complete transmission and related sensors.