Gmc acadia crank but not start

Things need to be tested before you buy parts you don't need . Check for proper spark , fuel pressure and injector pulse . Do you hear the fuel pump prime the system when you hit the key ? ( whhrrrrrr )

You've got a lot more going on than a crank sensor. Mechanics don't fix by codes. They find the area of a problem by codes then use diagnostic skills to find the actual problem. apparently, that's something you can't do, so have a mechanic fix it for you.

If you have a decent scan tool then put it on live data and start looking for bad data from any sensor, this can be done with the key in just the on position, engine doesn’t have to be running. It could be bad wiring or connector.

I'm guessing your check engine light has been on for awhile. You've got a lot going on with all those codes. You need to find a common denominator and go from there. With something like this you want a skilled mechanic to sort it out and fix it. In the end it'll be cheaper than you just throwing parts and money at it hoping to get it fixed. Jim