This happened on my 2021 Silverado 3500 gas. It did it the first time at about 1500 miles and I torqued the fuse box pins at that time and thought it was fixed. Happened again a couple of weeks ago at 6500 miles. First time hot sunny day running errands around town. Second time towing a 10,000# trailer in the rain for 200 miles and stopped for fuel. Both times restarted after 15 or 20 minutes. The second time I kept cycling the retained power by opening and closing the door and then locking it. After the 4th or 5th attempt it started like normal with no codes. Took to the dealer today for a scan and found no codes. They installed the ECM software update in the previously listed service bulletin, and also a recall on the infotainment system. Hope this is the fix. I have looked at the gas pedal thing and that is not the issue here as I have the Z71 mats that are installed correctly and always use my right foot on the brake pedal as everything I own has that requirement. I have had a couple of times when the dash indicated the remote was not found but it started anyways so that may be a sign of where the issue starts?
