Unlock the cluster and monitor your voltage. Most of the times I see random trifectas (sometimes accompanied by trans failsafe errors) it's a voltage issue as a result of a failing alternator.

It's not 100% that's your issue, but it's probably where I'd start. You have a chain driven TC so no actuator gear failure as a possible cause. Wait, is this on the 4.4 or the 4.6. If 4.4 then the gear could be the issue, listen for a tell tale knocking noise upon shutoff right under the driver's seat.

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