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I have no idea, there is SOOO much room under the hood, I KNOW it's not a space thing. The only reason I've seen a battery in the trunk is weight, there is some mention in the manual about 2 spots to jump start it. Ya know, if you're in a parking spot you can jump the car with another one that is pulled up to your trunk. The salesman told me the 'test group' that did the marketing tests for the trunk battery showed a 'signifigant interest in the younger demographics that are interested in stereo installation', as well. I'm gonna pretend it's a weight thing, makes me feel better. I have a set of 12's that I never installed in my last car, that would take about 2 seconds to throw into the trunk now, of course I have no use for the $100 worth of wiring for the amp now. I'd only need one input line running up front.
 

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The main reason for mounting the battery in the trunk is to prolong the life of the battery, temperature (and vibration) extremes under the hood seriously shorten the life of batteries.
You’ll notice on the new Colorado they have installed the battery in a “cooling box” under the hood due to the lack of a trunk on this pick-up.
Look for this new battery placement to become common on new GM models, the Olds Aurora had the battery in the trunk, it was very common for the battery to last the entire life of the car.
There are also some side-effect benefits as you have mentioned above to this mounting, the Cobalt can still be jump started utilizing jump-posts mounted under the hood for just such a purpose.
 

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ZX1100F1 said:
The main reason for mounting the battery in the trunk is to prolong the life of the battery, temperature (and vibration) extremes under the hood seriously shorten the life of batteries.
You’ll notice on the new Colorado they have installed the battery in a “cooling box” under the hood due to the lack of a trunk on this pick-up.
Look for this new battery placement to become common on new GM models, the Olds Aurora had the battery in the trunk, it was very common for the battery to last the entire life of the car.
There are also some side-effect benefits as you have mentioned above to this mounting, the Cobalt can still be jump started utilizing jump-posts mounted under the hood for just such a purpose.
Good post.
 

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Sp00ner said:
I have a set of 12's that I never installed in my last car, that would take about 2 seconds to throw into the trunk now, of course I have no use for the $100 worth of wiring for the amp now. I'd only need one input line running up front.
LOL! I feel you on that!!! Amp kits are EXPENSIVE!!! Good thing I get a discount bein an installer at Best Buy!!! :D
Don't forget your remote wire either... but you probably already knew that...
sorry.

And yeah Z, that actaully makes sense...never thought of it that way. I actually thought it was to help the car handle better. How'd you find that out??? Don't you work for GM, Is that how you found out???!?
 
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