2020 Toyota Tundra — buzzing noise only at one engine RPM

If it were in my driveway, capture voltage while the 2020 Toyota Tundra is actually failing — after it restarts you've lost the clue. That's the branch I'd chase this week. Happy to compare notes if your setup is different. Not trying to scare you — just skip the expensive first guess. Might be overthinking it, but I'd rather overthink than overspend.

Intermittent stuff lies if you only catch it once. Swap the cheap/easy piece first on the 2020 Toyota Tundra and see if the fault moves. If the cheap test changes it, stop and reassess. On “buzzing noise only at one engine rpm,” that was the fork that mattered for me. Happy to compare notes if your setup is different. Cold start is when I can actually reproduce it.

I wouldn't throw parts yet. A pressure test beats staring at a dry driveway if the 2020 Toyota Tundra is losing coolant with no puddle. Save the big job until that test fails. Any freeze-frame data saved? Heat soak after errands is the other window.