Left Rear intermittent Whine. Guessing something electrical

[pcww]

Mine is 2017 Tahoe which has given me great service with 250,000. Runs great but has developed a whine in left rear. If i did not know better i would assume it was a running motor of a air suspension system which i do not have. Can anyone suggest what the problem is. 98% sure it is electrical.

 

[Big Mama]

If it were the compressor on auto leveling it wouldn’t sound like a whine. Is the noise constant?