The latest Ecotec in the G5 and Cobalt need the Electronic (fly by wire) throttle body. We do not have it now but we are looking into producing some soon. The main problem is that the cores are costly at this time being a electronic design and it's also more work and care to manufacture it.
First like post above its a wire driven throttle body, and your wireless. 2nd, most times jsut adding a TB wont do anything at all for power incress but in your head. To make a TB work for a gain your also going have to do intake manifold. Then if you want to get most out of your money. Need a CAI, TB, ported intake mainfold, and headers to get full use of a larger TB. Just poping it on your not going to see anything or very little on a dyno