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High pitch squeak - Chevy 4.3L???? Any ideas?

With the motor running spay some sort of lubricant on the belt and see if it goes away. Do not use belt dressing that stuff sucks, I found WD-40 to work just fine.
 
Jonce, I built a TBI 350 in a 4x4 S-10. Worked out REALLY well. If you have any questions, or want to see pics, let me know. Since you have a two wheel drive, and it's a 4.3, and TBI already, it should literally be a 27 beer job..... Pm me, and i'll fill ya in.

PM'ed you back
 
So I've been working on a fix that will inherently fix the hitch pitch squeak for good even though it was fixed with the $7 base gasket. I believe I will have new problems in the future - white smoke coming from the rear tires :D Hopefully I can start putting in the radiator support, radiator, dual puller fans, hook up the power steering/heater/ac hose, etc. Still waiting for my wiring harness to show up along with a couple -6AN fittings due to backorder.

I started with a '02 Chev 5.3L Avalanche engine 285hp/325 ft lbs trq
2002Chev53Lfront.jpg


Cleaned it up a bit
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Then I had to pull the 4.3L and 4L60e out
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Engine is finally out
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Mate the 5.3L with the 4L65e
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First test fit, mark what needs "massaging"
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Check header clearance
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Notch frame for air conditioning compressor and bang a little on the cross member
JonceFirewallandFrame05.jpg
 
Had the same issue on a 94 Sonama and it's a cheap fix.It is in fact the Throttle Body gasket that is leaking.Does it sound like the Alternator packing in?High pitch sound.

I vote for this one. Its like the blade of grass between your fingers to make a squeal. Or maybe your flywheel is cracked or your tail light is pumping oil.
 
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