need location of belt tensioner on 1988 gmc jimmy 4x4 350

I'm not trying to be mean but if you can't find the tensioner on a serpentine belt 350 you need to consider a shop. If it was a snake it'll bite you as soon as you open the hood

YOU ARE MEAN,YOU ANAL RETENTIVE MORON.HAVE OR 6 BELTS ON MY MOTOR.NOT JUST 1!!

So it's got the older style belt drive and accesories that use the v belts. No need for the name calling. The reason you can't find one with the v belt setup is because there isn't one. The components are uses to tighten their belts. You should have 3 belts I think assuming you have an ac compressor still. On a v belt the power steering is the most likely to make noise, ac would be second most likely. Make sure there is no debris or fluids on the belts or pulleys.