Does not start with a new crankshaft position sensor installed?

Hello, what code are you getting for the Crank position sensor? What is the actual number? Most likely the new sensor you bought is no good, was it an aftermarket sensor? That way we can look up the code setting criteria.

I don't remember the code because it'd been a while since that happened (it's been parked since). The part the I bought was a Masterpro part#2-96174

Yeah, I wouldn't go with a Masterpro aftermarket sensor. When it comes to Crank and Cam sensors, you're best off buying an OEM manufacturer part. The Crank position sensor is almost the most important sensor on the vehicle, and we have been seeing part quality decline in the past few years really bad. So, buy an OEM from the dealership and see if the code sets again. It's possible in some situations for a bad cam sensor to trip a Crank sensor code. These trucks can run with a bad cam sensor but not a bad crank sensor. Let us know what code comes back if any after getting a good sensor in there.

So would ACDelco be OEM?

Here's the part number listed in service info. Labelled as Genuine GM parts
12560228. I see a lot of other aftermarket stores selling ACDelco or Delphi. Ordering from a dealership is the only way to know you're getting the OEM. You can try a cheaper brand but if the code sets again write down the number, it will be a powertrain code, so P with 4 numbers after it. Even putting the old sensor back in and seeing what the code is, if it ran with the old sensor in it, there might be something else going on with the vehicle.