My buick will not crank

Go to this walk thru link: https://www.2carpros.com/articles/car-engine-will-not-crank-over

Make sure the battery has enough of a charge in it and the battery terminals are clean and tight. If it is, have a helper turn the key to the start position while you check for power to the smaller wire on the starter. There should be 12v in the start position. If there is power, the starter is bad. If there is no power, check the starter relay for power.