alternator now?? ugh!

[ChaseN]

it does this every startup:
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this is the gauge while driving (i was coasting at 65mph) the gauge doesn't fluxuate once been running for about 10 min:

 

[02psd7.3]

its because its cold they all do it once it warms up it quits itis normal dont worry

 

[ChaseN]

it does it even when the weather is 80+.

my voltage goes from 15.4 to 10.6 then back up then back down.

while driving, i get a constant 14.6 until i let off throttle.

 

[aprudhomme]

mine does that ,once everything gets up and runing it is fine.. mine has done it since day one

 

[JFlagg]

Its the drain from the gridheater heating up.....the 2nd Gens are real bad about it....Though, it should stop when it gets warm.

 

[ChaseN]

had my buddy disconnect gridheater.
still does it.
getting a new alternator under warrenty tomorrow

 

[Burner]

did it fix the problem?

 

[ChaseN]

i pick my truck up at noon. i will know then.
it has been in the shop since wednesday morning.