1999 Buick LeSabre Q&A
1999 Buick LeSabre Question: my car will die when you let off the gas. Why?
Could be a vacuum leak, or a bad mass air flow sensor or several other things, if you have a yellow service engine soon light on, then it means that there is a code that will help determine what is wrong with your Buick. Get that code, you will need a scanner to read it. here are some shops: https://repairpal.com/directory?address=97333&car_brand_names=Buick - dandd