Voltage Drop

[thegreat22 1]

When I accelerate really quick my voltage drop to like 12.Didi not do this before big three. Any ideas?

[shizzzon 461]

how r u measuring this?

[thegreat22 1]

By the stock volumeter on my 01 tahoe

[shizzzon 461]

oh, hmm. This is more mechanical than anything.

Get someone else out there with you and meter the battery terminals when in park, gun it and see if you get the same thing on a multimeter.

First, we gotta see if your dash gauge has a faulty sensor first.

2nd, it's possible the voltage regulator may be damaged.

3rd, inspect your belt for extreme slippage.

Also, check for corrosion around battery terminals and alternator.