Hi and thanks for using 2carpros. Com
KG8 indicates a 130 amp alternator. There is no KG3. Where did you get that number?
Now, there is a technical service bulletin (TSB) related to incorrect coding. The alternator in your truck should be a 145 amp alternator. Take a look at this TSB:
ALTERNATOR - INCORRECT AMPERAGE CODING
Bulletin No: 04-06-03-001
Date: February 03, 2004
INFORMATION
Subject:
Incorrect Amp Code On Generator
Models:
2003-2004 Cadillac Escalade, Escalade ESV, Escalade EXT
2003-2004 Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe
2003-2004 GMC Denali XL, Savana, Sierra, Yukon, Yukon XL
2003-2004 HUMMER H2
The purpose of this bulletin is to inform the technician of an incorrect Amp code stamped on the generator. The code on the side of the generator reads 130 A and it should read 145 A. The 130 A has been stamped on the generators in error and does not indicate the actual amperage of the generator. A 130 A generator is not produced for this vehicle. The correct replacement for the above vehicles is the generator with the 145 A marking.
With that in mind, I believe the alternator needed is GM part number 10464476. However, that must be verified by your mechanic.
Let me know if you have other questions.
Take care,
Joe
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Tuesday, January 22nd, 2019 AT 8:45 PM