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Originally Posted by jonphelps1976

I have a 2000 silverado 5.3 with 140k on engine and 60k on tranny. Engine whines upon acceleration. I thought this might be a tranny problem but I also hear the noise when the truck in in park or neutral. Anytime I increase the acceleration I hear the whining noise. The more acceleration, the louder and higher the pitch becomes. Any ideas where to start?

Thanks.

Lots of possibilities here, for starters take off the serp. belt, see if the noise goes away, if so look for a noisey alternator, idler or tensioner pulley bearing.