I have a 2500HD Duramax in my truck. There are two batteries under
the hood. One is near the driver's side headlight and the other is
near the firewall on the passenger side.

I would like to know if the two batteries are directly in parallel or
if there is anything between them (besides battery cables).

My truck is 5 years old & I will be replacing the batteries within the
month. Is there any special way I should disconnect the batteries
when I replace them (since there are two)?

I've thought about replacing one with a new battery and then replacing
the other because I would always have 12V applied across the
electrical system. I wouldn't lose radio settings, etc.

I'd appreciate any suggestions.

"David" wrote in message news:7t96i4ttv978il9nt7aeibclft4jtd7h32@4ax.com...
>I have a 2500HD Duramax in my truck. There are two batteries under
> the hood. One is near the driver's side headlight and the other is
> near the firewall on the passenger side.
>
> I would like to know if the two batteries are directly in parallel or
> if there is anything between them (besides battery cables).

They are in parallel directly connected.


>
> My truck is 5 years old & I will be replacing the batteries within the
> month. Is there any special way I should disconnect the batteries
> when I replace them (since there are two)?
>
> I've thought about replacing one with a new battery and then replacing
> the other because I would always have 12V applied across the
> electrical system. I wouldn't lose radio settings, etc.

You can do that. At this time I only have one in my vehicle and runs fine.
Though if it gets too cold, I may have to add the other one.


>
> I'd appreciate any suggestions.