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Alternator replacement 105 amp or 100 amp?

Tiny
JEFFER10
  • MEMBER
  • 2000 CHEVROLET ASTRO
  • 3.1L
  • 6 CYL
  • 2WD
  • 180,000 MILES
This van has two alternator choices. Can I put 105 amp on to replace the100 amp without any problems?
Monday, February 14th, 2022 AT 9:35 AM

2 Replies

Tiny
AL514
  • MECHANIC
  • 4,669 POSTS
Yes, if they make a higher amperage Alternator for your vehicle. Many people do this when they have a sound system that requires extra current flow, or some other system that needs higher power/wattage. The engine computer will only command on the Alternator when it needs extra power. Most Alternators now are Pulse Width Modulated controlled to keep the battery at a certain level, this is done by the Engine Computer (ECM). 5 more Amps is really not much anyway.

https://www.2carpros.com/articles/how-a-car-battery-works

https://www.2carpros.com/articles/how-to-replace-a-car-battery
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Monday, February 14th, 2022 AT 11:28 AM
Tiny
JEFFER10
  • MEMBER
  • 5 POSTS
Thank you.
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Monday, February 14th, 2022 AT 5:35 PM

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