Hello I have a 2010 Caddy cts 3.6l v6 I have a dc power 240 amp alt and a MLA module and still can't keep high voltage in my car I had both professionally installed, and to make sure that the install was done correct. I gave the shop MLA number he talked to the guy for the diagram and installed it ( how they recommend to install). My voltage cold when I start it is 14.8 and then move down to 13.8 and that's the highest it ever is. I watch the voltage move down to 13.1 and when heat is running its down to 12.8 and move back up to 13.8 and no higher only lower. I called MLA and they say its on the alt and I call dc power and they say it's MLA. I spend a lot of money on purchasing these products (MLA module and Alt) and that's not including the shops install( a lot of money). I need help on getting my voltage up. I want to thank anybody that can help or recommend some kind of solution.