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Hello, I'd be happy to help! First, what engine does your truck have?
Ok do you have access to a scan tool that shows live data?
It's very likely you have an intake manifold gasket leak, they are extremely common on the 4.2L engines because of poor design of the isolator bolts.
The other possibility is a vacuum leak, which I assumed you've checked for already. If not do that. If there is no leak I would go with the intake manifold set and the isolator bolts for the manifold, dealer parts only. Because all you have is a code reader there's no way to diagnose it correctly because we need to see fuel trims to diagnose that, but like I said they're extremely common I've done my fair share if them. If you have any more questions let me know. Please don't forget to rate, they won't compensate me unless I've been rated. Thank you!
Did you replace those bolts as well with the updated bolts? Did you do upper middle and lower or just upper, and did you tighten them I'm the correct order?
Hello, just wanted to check on your truck and see if you've had time to figure out anything. If you have any more questions let me know, and keep me updated on your progress. Please don't forget to rate, they won't compensate me unless I've been rated. Thank you!
I'd also like to mention the PCV hose is common to leak and PCV can stick open causing this code. So assuming gaskets are not leaking i'd start by giving PCV hose a good look and replace PCV with one from dealership. Let me know how it goes or if you run into questions, thanks.