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Alternator Upgrade

bossier62guy

By bossier62guy
in Ask A GM Technician

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bossier62guy Senior Enthusiast

bossier62guy

Posted
Posted

I've got a 2002 Chevrolet Silverado Z-71 w/ a 5.3L engine and the standard 105 amp alternator. I've recently added some upgraded audio gear and an electric fan to the truck and I've noticed that now when everything is kicking along the volts gauge dips to about 12 volts when the truck is in gear and sitting still. I did also check this with a multimeter to verify the gauge operation and the gauge is right on the money. BTW that's the only time it dips that low. I was curious as to whether I could do a direct swap w/ the 130 amp alternator that was offered as an option for piece of mind. I know the alternator will physically fit but I'm more concerned as to whether any wire upgrades, fusible links, etc. should be changed as well. Thanks to anyone that can offer some insight....here's to you GM tech, our prays are with you!

  • 3 weeks later...
mooreapi Enthusiast

mooreapi

Posted
Posted

bossier62guy,

I have done this upgrade on my 2000 silverado. The only difference is that you will need a slightly longer belt ( i forget how much, exactly). I think they list the belt for the truck with the 130A alt (i think this is the one from the snowplow pkg).

 

Matt

bossier62guy Senior Enthusiast

bossier62guy

Posted
  • Author
Posted

Thanks for the info....

 

bossier62guy,

I have done this upgrade on my 2000 silverado. The only difference is that you will need a slightly longer belt ( i forget how much, exactly). I think they list the belt for the truck with the 130A alt (i think this is the one from the snowplow pkg).

 

Matt

 

 

 

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