Okay, first, this has no effect on the truck not running.
Second, that is not the correct valve for the system. I do not know who gave it to you but it is not for your truck.
If it were missing or defective, you would have a check engine light on and would have a code.
Can you please give me the circumstances for it not starting?
https://www.2carpros.com/articles/car-cranks-but-wont-start
Roy
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Saturday, February 1st, 2020 AT 2:15 PM