2021 Trailboss 6.2. Owned 1 month/1005 miles and same issue. Tried starting multiple times and starter will engage but engine will not fire. Let sit for a few hours and tried again and engine finally fired up. Check engine light on so drove down the street to the dealership. Codes P00C6 (Fuel rail pressure too low - engine cranking bank 1) and (Fuel pump driver control module enable circuit performance). Waiting to see how long it will take to fix. Confidence in truck is diminishing sadly. Love my truck but NOT happy!
