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Dual Battery

crazydog

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crazydog Enthusiast

crazydog

Posted
Posted

I custom ordered my 08 and included the extra battery because the truck sits out in the parking lot on a hill every night while I'm at work--making for a very cold start!

 

When I traded to the 10, I had to find the closest match and it didn't include the extra battery . . .

 

Does anyone think it's actually necessary/helpful unless you live in, say, Alaska? lol.

pwall Senior Enthusiast

pwall

Posted
Posted

I would agree with Jarod.....one real good battery will get the job done.

In my '02 YukonXL, I installed a 1000cca battery....even at -35c the truck would turn over just fine! :cool:

 

Now, if you wanted to run a couple of amps and subs, then an extra battery would come in handy.

crazydog Enthusiast

crazydog

Posted
  • Author
Posted
I would agree with Jarod.....one real good battery will get the job done.

In my '02 YukonXL, I installed a 1000cca battery....even at -35c the truck would turn over just fine! :cool:

 

Now, if you wanted to run a couple of amps and subs, then an extra battery would come in handy.

Ah, so it's not really for starting--it's for "amps and subs", hahahaha! Good to know!

So, is the stock battery as good as the one you put in?

pwall Senior Enthusiast

pwall

Posted
Posted

No...the original factory battery in my '02 was a 600cca. Up north here, I perfer something with more power.

As I needed a battery for my car, I took the one from the truck and used that, and put in a new 1000cca into the truck.

Never had a starting issue, no matter how cold it got.

crazydog Enthusiast

crazydog

Posted
  • Author
Posted
No...the original factory battery in my '02 was a 600cca. Up north here, I perfer something with more power.

As I needed a battery for my car, I took the one from the truck and used that, and put in a new 1000cca into the truck.

Never had a starting issue, no matter how cold it got.

Hmmm, I'll have to think about that--might be a good idea. Thanks!

yukon25008.1 Senior Enthusiast

yukon25008.1

Posted
Posted

In my 04 yukon 2500 i see the spot on the pass side for the second battery but theres not one, and i am running an amp an two 12" subs.. could i add the second battery without a huge headache?

ss502gmc Enthusiast

ss502gmc

Posted
Posted
In my 04 yukon 2500 i see the spot on the pass side for the second battery but theres not one, and i am running an amp an two 12" subs.. could i add the second battery without a huge headache?

 

 

In my HD i got the battery tray from the dealer for around 60 bucks and 2 1000 cca batteries for $180 and 16 or 18 ft of 1/0 ga battery cable which was pricey at $3 a foot but all you gotta do is remove the corner brace from the fire wall to the fender and with mine i had to cut off the tab where the brace bolts on to the firewall. its a tight squeeze but not hard at all but so well worth it. Especially running the plow and lights and everything in the winter. not a problem at all

yukon25008.1 Senior Enthusiast

yukon25008.1

Posted
Posted

So what do you do after you get the battery in place the negative and postive just connect to the negative and positive on the existing battery??

markw8 Enthusiast

markw8

Posted
Posted

On gas motor Chevy-GMC's even with the second battery option, only one is used to start the truck. The second is only on line while the truck is running.

 

Mark

Shawn T Enthusiast

Shawn T

Posted
Posted
On gas motor Chevy-GMC's even with the second battery option, only one is used to start the truck. The second is only on line while the truck is running.

 

Mark

 

Correct, if you ordered a gasser your only starting with one battery anyway. The second runs all accessories and is included on the snow plow prep package to suplimnent the hydraulic pump and lights. I'm sure the FLA draw by a gas motor starter is less than the diesel. It doesn't mean that the 2 batteries are going to hold a charge better or crank the motor any "harder". They are wired in parallel, and deplete/charge equally. I know on a Duramax, if one loses a cell and goes bad you may as well change them both. The diesel motor just needs the extra oomph to overcome the higher compression, bigger starter, higher current draw.

4wd Enthusiast

4wd

Posted
Posted
On gas motor Chevy-GMC's even with the second battery option, only one is used to start the truck. The second is only on line while the truck is running.

 

Mark

 

Correct, if you ordered a gasser your only starting with one battery anyway. The second runs all accessories and is included on the snow plow prep package to suplimnent the hydraulic pump and lights. I'm sure the FLA draw by a gas motor starter is less than the diesel. It doesn't mean that the 2 batteries are going to hold a charge better or crank the motor any "harder". They are wired in parallel, and deplete/charge equally. I know on a Duramax, if one loses a cell and goes bad you may as well change them both. The diesel motor just needs the extra oomph to overcome the higher compression, bigger starter, higher current draw.

 

 

I posted this on the OEM setup, as you can see they are connected differently depending on the RPO code:

http://www.gm-trucks.com/forums/index.php?showtopic=117567

jro909 Senior Enthusiast

jro909

Posted
Posted

no point, one good battery is suffient unless your running a microwave out of the cab.....live in -27 degree winters with the truck sitting all night and she starts fine...hell i have the oem ac delco battery and it still works like a dream after 6 cold harsh winters...

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