It doesn't matter if you just installed it 10 minutes ago. If you are abusing it, it won't work properly when the temperature starts to fall.

 

So what do people with the huge systems in their trucks run? I have two amps and a sub. Nothing too crazy. I have a diehard gold..about 2 months old.

I also got my fuel filter and a case of penzoil 5w-20 and a new filter. just need the plugs now.

 

This is where a lot of people mess up with that stuff. When your truck is running, it is ALL ABOUT THE ALTERNATOR. The alternator is what supplies the juice while the engine is running. If your alternator can not provide enough current, the difference falls on the battery for the entire time you have the system cranked and as a result, your battery is discharging rather than charging. Next time you need to start the truck, the battery will not have been recharged enough. This goes on over time and eventually you have a dead battery.

 

so do you think I need a more powerful alternator?

 

I don't know, I'm just throwing it out there as a possibility that needs to be looked into. You need to see how many amps all your extra stuff draws and compare that to what your alternator can supply. You could very well be within the limits and something else is wrong. I don't know.

 

This one (http://www.polkaudio.com/caraudio/products/amps/c400_4/) pulls 400 watts and this one (http://www.polkaudio.com/caraudio/products/c500_1/) pulls 500 watts. Then my speakers probably use more than the stock ones as well