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The fix for my endless alternator failure's

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Old Sep 8, 2010 | 08:11 PM
  #141  
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I need one of these, my alternator pulley just started squeaking real bad. I guess the bearings are bad.

What years and models do I look for? Want a 145 amp one
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Old Sep 8, 2010 | 09:18 PM
  #142  
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99-04 Off of a 5.3 or 6.0 truck/suburban/tahoe/van/whatever. Its RPO code KG8 for the 145 amp. They also have a 130 amp that should work fine as well, I think thats more common on the SUV's.

Also, before you start working on it make sure you have a nut for the terminal, I figured they were the same and I was wrong, so I had to dig around and find one.
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Old Sep 8, 2010 | 10:03 PM
  #143  
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Originally Posted by Arc00TA
99-04 Off of a 5.3 or 6.0 truck/suburban/tahoe/van/whatever. Its RPO code KG8 for the 145 amp. They also have a 130 amp that should work fine as well, I think thats more common on the SUV's.

Also, before you start working on it make sure you have a nut for the terminal, I figured they were the same and I was wrong, so I had to dig around and find one.
Ok, thanks.

You don't use the rear mounting point (13mm bolt), right?
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Old Sep 8, 2010 | 10:11 PM
  #144  
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Originally Posted by 94'BLKBRD
Ok, thanks.

You don't use the rear mounting point (13mm bolt), right?
Nope. I left the bracket there though, it does not interfere with mounting the new alt. There is also plenty of wire on the stock plug to reach. The only thing I did was bend the PS lines a little bit, as they were about 1/2 inch away from the side of the alt.
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Old Oct 5, 2010 | 06:06 PM
  #145  
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Just wanted to throw this in. Make sure the alternator you order has the "oval" connector for the small wire PED connector (exciter wire I believe it's called). I told my parts guy 145amp 4 pin "2000-2003" year and ended up with an escalade alternator that fit great but had to order a square connector and splice the wire to it in order to plug that part in...shamrock chevy had to ship it in, took 3 days.

Most of them came with an "oval" piggyback on the car, but some have a square one and they don't stock the square connector cause very few used it.

Just something to watch out for.

Kyle
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Old Oct 5, 2010 | 09:09 PM
  #146  
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never knew they had square plugs
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Old Nov 3, 2010 | 12:33 PM
  #147  
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So does the alternator give more power to the fuel pump also, acting like a volt booster ?
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Old Nov 3, 2010 | 03:59 PM
  #148  
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i would say a sure and steady supply of juice to the fuel pump is better than an over load of voltage
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Old Nov 24, 2010 | 09:52 PM
  #149  
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SOMETHING HERE IS LEFT UN-IDENTIFIED !!!! our f-body has a 2 pin & the new alternator has a 4 pin style ...... where to get the connector & how do we rewire the truck alt ???
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Old Nov 27, 2010 | 03:43 PM
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Thanks to the OP and sjsingle - I went out to Princeton and picked up a 145amp AD244 from a 2004 Yukon XL to replace the new Ultima 102amp that had failed within a month of purchase. The alternator slipped right up past the fan shroud and was an easy mount - It doesn't look like I need to change belts but hard to tell for sure. I'm cranking out 13 amps at idle on a hot engine with ac blowing hard and 1000w amp cranked up - hope it's the last time I have to change an alternator for a while, but we shall see.

Might look to do the "Big 3" upgrade though the "sticky" has lost all it's pictures
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Old Nov 27, 2010 | 03:59 PM
  #151  
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https://ls1tech.com/forums/general-m...need-help.html

pics of my big 3 in here
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Old Dec 5, 2010 | 11:37 PM
  #152  
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Originally Posted by Reaperchild
SOMETHING HERE IS LEFT UN-IDENTIFIED !!!! our f-body has a 2 pin & the new alternator has a 4 pin style ...... where to get the connector & how do we rewire the truck alt ???
Never seen an f body with a 2 pin connector....? In any case you should have only one wire going to that connector, if you will get a replacement 4 pin connector from the parts store you can cut the connector off your car and wire up the 4 pin and plug it in to the truck alternator, if you look close at the connector on the truck alternator the pins are labeled by a letter on the black plastic part of the connector, you want to run the exciter wire to the pin labeled "L".

Originally Posted by Head Hunter
Thanks to the OP and sjsingle - I went out to Princeton and picked up a 145amp AD244 from a 2004 Yukon XL to replace the new Ultima 102amp that had failed within a month of purchase. The alternator slipped right up past the fan shroud and was an easy mount - It doesn't look like I need to change belts but hard to tell for sure. I'm cranking out 13 amps at idle on a hot engine with ac blowing hard and 1000w amp cranked up - hope it's the last time I have to change an alternator for a while, but we shall see.

Might look to do the "Big 3" upgrade though the "sticky" has lost all it's pictures
Good to hear! Mine is still perfect so I am confident I won't have to mess with this anymore. I have put a little over 6 months and probably about 10k miles on this junkyard alternator and not an issue yet as far as charging.



I do have a small issue though, I am having belt squeal issues, even after replacing the belt, the alignment seems to be a hair off at the the alternator to idler pulley to crank pulley area, anyone else having any issues? I did change the idler pulley at the same time so it could be that pulley, but I lost the factory original so I cannot test that theory, if someone had one even with a bad bearing I would be interested in it.
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Old Dec 6, 2010 | 09:05 AM
  #153  
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I haven't the slightest trouble with the alternator and have not had any belt squeel since making the switch over.
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Old Dec 6, 2010 | 11:49 PM
  #154  
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Originally Posted by Head Hunter
I haven't the slightest trouble with the alternator and have not had any belt squeel since making the switch over.
I didn't have the problem for quite a while, but since it has started rain seems to really enhance the issue. I am really leaning toward the Oreilly idler pulley I put on it being the culprit, I had every intention of saving my OEM one but can't find it anywhere and don't think I threw it out. The Oreilly one never seemed quite right it appears the belt is too close to the front of the pulley which is rounded so I think it is pushing the belt forward, if I hold something against the belt like a screwdriver and push backward just a hair to where the belt runs a little further back on the idler the squeal stops.

I used a stethoscope and the squeal is coming from where the belt enters the crank pulley, so all this gathered info tells me the belt is a bit forward where it enters back onto the crank pulley. So either the Alternator pushed the belt forward and it now rides closer to the front of the idler pulley, or the idler pulley does not stick out as far and the belt runs on the rounded nose pushing the belt forward. I don't have either one of the original parts (alt or idler) to test this though
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Old Dec 7, 2010 | 01:23 AM
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its always the damm pulley by the alt
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Old Dec 7, 2010 | 03:09 PM
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Originally Posted by sjsingle1
its always the damm pulley by the alt
Have you had this problem too? I'm not sure what you meant by the post? I did notice your pulley and bracket looked new in some of your posts though...
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Old Dec 7, 2010 | 03:26 PM
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the pulley was new............the bracket was old......but i do have a new 1 i did not install.......in 2000 there was a TSB about the pulley so they were changed.....so there are 2 different sizes.....make sure you get the right 1 if you do get a new 1......the sqeaks drove me crazy........every pulley is new along with the belt
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Old Dec 7, 2010 | 08:18 PM
  #158  
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Originally Posted by sjsingle1
the pulley was new............the bracket was old......but i do have a new 1 i did not install.......in 2000 there was a TSB about the pulley so they were changed.....so there are 2 different sizes.....make sure you get the right 1 if you do get a new 1......the sqeaks drove me crazy........every pulley is new along with the belt
The pulley I have on there now is a new one from Oreilly's and it is the same diameter as the one I took off. I also have a new water pump, new tensioner pulley, new power steering pump pulley (old one broke, dont ask lol) so pretty much all my pulleys are mint... I don't know what the hell the problem is.
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Old Dec 7, 2010 | 08:30 PM
  #159  
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Originally Posted by 00pooterSS
The pulley I have on there now is a new one from Oreilly's and it is the same diameter as the one I took off. I also have a new water pump, new tensioner pulley, new power steering pump pulley (old one broke, dont ask lol) so pretty much all my pulleys are mint... I don't know what the hell the problem is.
My wifes WS6 has been doing this forever, I replaced the belt and pulley and the bastard still squeaks.
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Old Dec 8, 2010 | 01:22 AM
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do ya know the part num on your alt bracket? the new style is 12563327.....i am using dayco belts ......main and a/c
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