So I'm in a dilemma. I have the Limited 5.7 with etorque and Harmon Kardon system. I am getting rid of the Harmon Kardon and installing about 3000 watts in the truck. I dont know if this will be too much and cause my lights to dim as you sometimes see. I was going to upgrade to a high output alternator, but didn't know my truck has no alternator. I know the etorque is 48 volts. Is it enough to carry the amperage of the sound system? If not, how can I get more amperage?