What is the best battery for a Yukon XL Denali 6.0L. I have a problem now when I havent ran it for a week I go out to drive it and it really dims the lights and starts but I know when the weather gets cold if I dont start it weekly it wont start when I need it. I even have it in a heated garage at about 50 degreee'*. What would be the best battery for me to have no issues with the vehicle starting after say a month of not being used. Any help will be appriciated.

I meant to add in the best cold cranking amps because we get to -30 where we are sometimes weeks at a time. I need help

interstate makes the best starting batteries. although if you are going to leave it you are going to need a trickle charger. i keep my yukon in the garage during the winter and if you dont put the trickle charger on it its going to be almost dead. theres a bunch of stuff drawing all the time and going dead isnt good for the truck or the battery. ctek and battery tender are good and have quick attach couplings available

I just bought a 800 CCA battery for my Silverado. $200 though, and that was a Duralast.

For that money, get an Optima.

Optima makes an awesome battery. With all the bells and whistles in that vehicle I recommend a battery with about 800 CCA.

Of course I was stating the retail price. I didn't pay nearly that. I only paid $75 because of commercial discount.

Where did you buy that battery from because Im in need of one.

I got it from Auto Zone like I said. I also said I got it with my commercial discount for working at an independent garage. If you don't work for a garage, you won't get that price.

Im going to start selling my cars and toys due to medical costs from my wife'* medical bills. She was diagnosed with AML lukemia and Im trying to hold it together and sell as much as I can for my wife'* bills. So If there is anyone interested in the cars I have listed below my post they are all for sale. I hate to sell because I love my cars but I love my family more. I hope I keep up with her bills because I wil never declare bankruptcywhich is not an option. Take Care guys

It sounds like you just need a good battery maintainer/trickle charger like Justin suggested, as long as your battery can be fully charged back up, then I think just getting a battery maintainer will be all you need for good while.
I hate to admit it, but I use a cheapo Walmart Everstart battery, along with the following battery maintainer, and the battery is always fully charged, and the car starts right up no matter how cold it is.


That battery maintainer comes with the quick connects, and is small enough that I leave it under my hood/on my radiator hose, and am able to close the hood, of course when doing that make sure the engine is not hot, I cannot imagine the heat would be good for the charger.