Why won’t my car idle or run?

Hello, my first thought is that it could be an anti-theft chip key concern - if it's equipped. I am not certain when Buick started doing this, but it could be that the key being used is not programmed to the vehicle. Another thought is related to vacuum leaks or a big air intake leak - meaning no fuel pressure will ever be able to keep up with all the air. Hands on testing is needed further - these are educated guesses, but until you have testing performed, guessing is all it is. https://repairpal.com/auto-repair-near-me