2000 Chevy Venture car shuting down after start up

will it run if you give it a little gas and run smooth?if so get the codes scanned i bet the tps is gonna come up bad.

It sounds like they may have disconnected a vacuum line when doing the throttle body service. Here are two guide to help us fix the problem and I have included how to service the throttle body which should have been done during the tune up.

https://www.2carpros.com/articles/stall-at-idle

and

https://www.2carpros.com/articles/throttle-actuator-service

I would service or replace the idle air control valve as well. Check out the images (Below). Please let us know what you find. We are interested to see what it is.