I have a 1997 Chevrolet 4x4 silverado will crank but will not start. Was running and just died and will not start back. Acts like it's out of time but it's not, any suggestions

Well there's 3 things that starts a motor! you gotta have 1.Spark, 2. Fuel, 3. Power. When you turn your key to start it up what does it do? Check to see if your Fuel Pump is kicking on!

It cranks and the motor gets tight like it's in the timing

The fuel pump is kicking on

Just need to check for spark, and to see if there is fuel pressure. Fuel pressure should be 56 to 63 lbs. at the Schrader valve.

Check to see if your Plugs are getting Fire!

What will the truck do if the crankshaft sensor is bad?

Not start.

Okay will it just suddenly die and not start back?

You could have it scanned to see if there are any codes. First you need to know if there is spark and fuel pressure.

Sounds like you are not getting spark.

There is spark and fuel pressure

What is the fuel pressure? And then have it scanned for codes.

Will it just suddenly die and not start back if it's the crankshaft sensor?

I Agree with Rowefast, Scan for codes. Write them down that way its much easier to trouble shoot your problem!

Okay thank you!