Silverado help

[Tripn88]

I have a 2003 silverado 4.8. When I had my stock 105amp and a duralast battery. I had bad voltage drop. I have upgraded to a 240amp alt and my truck will only charge at 14.4 or higher in the mornings. After it warms up I can't get it over 13.9. I did this with my stock alt also. I replaced battery a few weeks ago. I have a 3 wire plug on my truck. I assume this is just typical and ****** luck haha. Voltage drop is minimum with all accessories on and radio playing. Stays in the 13.7-13.9 area.

Anyone have any experience with this or suggestions. I don't want to go to an external regulator if I can help it.

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[los33 10+ year member]

I have a 2003 silverado 4.8. When I had my stock 105amp and a duralast battery. I had bad voltage drop. I have upgraded to a 240amp alt and my truck will only charge at 14.4 or higher in the mornings. After it warms up I can't get it over 13.9. I did this with my stock alt also. I replaced battery a few weeks ago. I have a 3 wire plug on my truck. I assume this is just typical and ****** luck haha. Voltage drop is minimum with all accessories on and radio playing. Stays in the 13.7-13.9 area.
Anyone have any experience with this or suggestions. I don't want to go to an external regulator if I can help it.

Its how the stock regulator works. It check the temperature and brings the voltage down.. Mine goes to 14.2 after warmed up.

Most add a diode to the sense wire if they dont want a external regulator..

The easiest way without a real external regulator is xs power vcm module

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[Tripn88]

Its how the stock regulator works. It check the temperature and brings the voltage down.. Mine goes to 14.2 after warmed up.
Most add a diode to the sense wire if they dont want a external regulator..

The easiest way without a real external regulator is xs power vcm module

Sent from my draconis using Tapatalk

Do you know if the xs power vcm will work with 3 wire alternators? It has the oval 4 wire plug but only 3 wires coming from it. I'll email them tomorrow if need be.

 

[los33 10+ year member]

Do you know if the xs power vcm will work with 3 wire alternators? It has the oval 4 wire plug but only 3 wires coming from it. I'll email them tomorrow if need be.

I dont know.. From what i know the only non supported were 2006+

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