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Mr. Sparkle
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Ive wanted to do this mod for several years and I have finally gotten around to it, here are some of my thoughts.

I bought a remanufactured Delphi alternator off ebay early December for $85 shipped. The AD244 came in like new condition. Additionally, I ordered 6 ring terminals and some Kicker 4ga wire to do the Big 3 and some post extenders. Total came out to be around $150 or so. I also replaced the tensioner at the same time.

The reason I did the alternator swap was because my stocker had a worn out bearing creating a really bad whine at temperature. Although it was charging fine, I was tired of hearing the whine.

The installation was fairly simple. As explained in the initial how to, three bolts and the stocker is out. The stock alternator weighs maybe 10 +- pounds where my AD244 weighed at least 30 or so pounds. Negotiating it into the stock alternator bracket took some finess and I had to resort to prying out the old one with a small pry bar. My clearances are perfect. The alternator doesnt rub against anything or come into contact with any lines/supports near it. I have a 2002 Blazer and 96" was the perfect length. At the time of replacing the alternator, I noticed the tensioner was bad so that was replaced as well.

I have a Scangauge PCM reader tool so I can easily measure Voltage output under a series of conditions. At a cold idle, the orig alternator would maybe do about 13.2V where now the AD244 does about 14.4 or so normally Cold. At idle hot with minimal load (DRL and radio only, E Fans off) it never goes below 13.4 or so but generally is in the 13.6v area. Under maximum load it rarely goes below 13v unless my LS1 fans kick on for a split second, but never below 12.8v. This is a HUGE improvement over my factory alternator which I would routinely see 11.8-12.2 at idle with dimming lights etc.

If you can spare the money, do it. I see no real driveline loss or power loss in real world driving and never have dimming lights or other charging issues.
 

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Looking to do this on my 98 s10 this weekend on 4.3 just curious if anyone knows what size belt I need as I won't be able to drive back up to the store
 

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I tried this swap in my 01 blazer Vin w and I get the battery light turning on and off.... need some help here... my plug for the alternator has 2 wires coming out of it gray and red... gray goes to c and red get to b.
 

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So I got a cs130d out of a 99 Silverado. Trying to put it on my 01 blazer extreme (and it isn't a simple plug and plug wire hook up..) The battery light keeps coming on and off....put that same alternator on my 2000 Sierra pick up and it doesn't do that kinda lost cause I've read this whole thing and have seen anyone else with this problem any help would be awesome... thanks
 

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10,898 Posts
From AC's site

1 335-1086 88877296 NEW GENERATOR/
ALTERNATOR
2004 - 2002 CADILLAC, 2005 - 1999 CHEVROLET, 2005 - 1999
GMC, 2001 - 1999 OLDSMOBILE

2 335-1091 88877301 NEW GENERATOR/
ALTERNATOR
2005 - 2004 BUICK, 2005 - 2002 CHEVROLET, 2005 - 2002 GMC,
2005 - 2003 ISUZU, 2004 - 2002 OLDSMOBILE, 2005 - 2005
SAAB

3 335-1068 88877278 NEW GENERATOR/
ALTERNATOR
2000 - 1999 CADILLAC, 2002 - 1996 CHEVROLET, 2002 - 1996
GMC, 1997 - 1997 ISUZU, 1998 - 1996 OLDSMOBILE

4 335-1092 88877302 NEW GENERATOR/
ALTERNATOR
2002 -2002 CADILLAC, 2002 - 1999 CHEVROLET, 2002 - 1999
GMC, 2001 - 1999 OLDSMOBILE


5 335-1090 88877300 NEW GENERATOR/
ALTERNATOR
2006 - 2005 CADILLAC, 2006 -2005 CHEVROLET, 2006 - 2005
GMC

6 335-1067 88877277 NEW GENERATOR/
ALTERNATOR
1996 - 1996 BUICK, 1999 - 1995 CHEVROLET, 1999 - 1995 PONTIAC

7 335-1088 88877298 NEW GENERATOR/
ALTERNATOR
2005 - 1999 BUICK

8 335-1095 88877305 NEW GENERATOR/
ALTERNATOR
2005 - 2000 CHEVROLET, 2005 - 2000 GMC, 2001 - 2000
OLDSMOBILE

9 335-1023 88877233 NEW GENERATOR/
ALTERNATOR
1996 - 1988 CHEVROLET, 1996 - 1988 GMC, 1993 - 1991
OLDSMOBILE

10 335-1025 88877235 NEW GENERATOR/
ALTERNATOR
1989 - 1988 BUICK, 1988 - 1987 CADILLAC, 1995 - 1987 CHEVROLET,
1994 - 1987 OLDSMOBILE, 1995 - 1988 PONTIAC
 

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Also the part number is 22781131 it's a ac delco just different one.. I found a YouTube video with a guy who installed one on his blazer so I think I'm ok.. I hope so I don't have money to take a $100 loss on a alt
 

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I just did the "Big Three Upgrade" and Alternator (145A) upgrade on my 1999, 4x4, 4.3L yesterday. I used 4 AWG for the "Big Three Upgrade" . I purchased my alternator and belt from Rock Auto. Everything was plug-n-play and seems to be working just fine.

Alternator part number 91653.
Belt part number 5060960.




 

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I just did the "Big Three Upgrade" and Alternator (145A) upgrade on my 1999, 4x4, 4.3L yesterday. I used 4 AWG for the "Big Three Upgrade" . I purchased my alternator and belt from Rock Auto. Everything was plug-n-play and seems to be working just fine.

Alternator part number 91653.
Belt part number 5060960.




Perfect fitment and reading (the second time around)
334509
 
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