[djdalite]

Just replaced my battery cause it was getting hard to crank my car (slow starter noise), since it was the original battery I figured it was going bad, especially after my battery charger failed to charge it and indicated so. Charger also had a diagnostic for the alternator but only displayed a given voltage range for it so I thought it was fine, that is until after today when i noticed my voltmeter reading 14v+ at start/idle and then while driving it dipped below 14v about a 3 notche or so flux

What do you guys think? (I just read the thread that has to do with the electrical system diverting alternator power and battery power) so I'm just not sure

Pics:

 

[SRTH8R]

Normal

 

[chevyman420]

It's fine

 

[ssam98]

Just replaced my battery cause it was getting hard to crank my car (slow starter noise), since it was the original battery I figured it was going bad, especially after my battery charger failed to charge it and indicated so. Charger also had a diagnostic for the alternator but only displayed a given voltage range for it so I thought it was fine, that is until after today when i noticed my voltmeter reading 14v+ at start/idle and then while driving it dipped below 14v about a 3 notche or so flux

What do you guys think? (I just read the thread that has to do with the electrical system diverting alternator power and battery power) so I'm just not sure

Pics:

the charging system is fine, but keep your eye on your starter.

 

[badhabit73]

what year truck??? on the 07-09 trucks there is that darned power control unit thingy that is a pain....it doesnt stay at 14.4v all the time...:burp:

 

[1FAST07SS]

Mine looks the same and it's been that way since I've owned it.

 

[djdalite]

It's an 08. Thanks guys, I just never paid attention to it until I started to have issues so I never noticed where it was supposed to be

 

[caroutisine]

It's normal don't worry about it. But as stated above, it maybe your starter. I had the starter replaced in my '06 at about 40K mikes.

 

[BBA]

It's normal, the pcm determines optimal voltage for reduced load and reduced battery overcharging depending on temperatures, current measured by the sensor and load. BTW: The voltmeter in the truck is not accurate either...put a real meter on and watch what real voltage does if you just 'want' to know for sure.