SApache40

iTrader: (15)

I just got done installing the kg3 alternator and the big 3 upgrade. I was then going to put the belt back on and it was way too tight. I was barely able to slide the belt over the tensioner pulley. I have a powerbond underdrive pulley and was using a 760K6 belt before the kg3 install. Which belt am I suppose to use with a underdrive pulley and kg3 alternator? The alternator came off a 04 silverado 6.0L.

99Bluz28

iTrader: (35)

Is this with the factory tensioner, or a manual tensioner?

SApache40

iTrader: (15)

It's the factory tensioner.

99Bluz28

iTrader: (35)

760K6 , the 76 is the length in inches, so get at least a 770K6(77"), a 775K6(77.5") or a 780K6(78"), whatever length give you the minimum amount of slack(from full tension) you're happy with.

SApache40

iTrader: (15)

I compared pulleys and they were the same. I looked at many threads and everyone said the kg3 alternator and factory alternators use the same belt. Do I have the wrong alternator or is this normal? Anyone else with a kg3 alternator and underdrive pulley? Which belt did you use?

sjsingle1

iTrader: (1)

the stock belt worked for me........was a little tighter.........but still worked

SApache40

iTrader: (15)

Is there any way to identify the 99-03 KG3 Alternator from other truck alternators.?The one I have does not have any numbers or labels.

sjsingle1

iTrader: (1)

not that i know of