it may be you powersteering pump get in week even though some winding is normal
you might want to check your left side wheel bearings
Braking
it is the idler pully. i just replaced mine and all the whining stopped
The braking system makes a car stop.
It is probably the alternator that is whining - and not charging so you have run out of battery power and it won't turn over.
Chevrolet
Chevrolet makes the Silverado 3500. The Silverado name has been used since 1975 (at first only for the specific type of trim on some Suburban models). The luxury version of the Silverado is the Sierra line.
Bad bearing in compressor? Bad bearing in compressor?
GM SMaRT oNE
change brakes or check drums
My CJ7 also makes this noise. I think it is supposed to make that sound at a higher speed (5-20 MPH)
What makes you think they do? They have one type system. Hydraulic.