Hello everyone, I've been lurking here for a while, and finally took delivery 2 weeks ago of my new 3/4 ton, 4x4 Chevy Suburban. I am very really very satisfied with this truck, but been my first GM vehicle, I have some questions that perhaps someone can help me with: 1. Is this truck considered a 1500 platform? I would assume it's a 2500, but would like to be sure. 2. Why does it have 2 batteries? Nowhere in the manual do they mention 2 batteries 3. It has a very nice V8 rumble... I love the sound coming from the exhaust! Does it make sense to change the exhaust system? My friend has a huge Express van and he did change the exhaust.... nice deep rumble. If the answer is yes, which do you all suggest? Thanks for reading!!!