Got about 3,000 miles on my 05 WBH Blue Beast, the AEM Brute force seems to work well, now getting ready to have the Corsa Touring installed next week. Plan to use my AV for some medium/light but long distance towing ( my boat pkg weighs in at about 3,000 lbs) and I have the 3.42 gears. (I'm not looking to burn up the road but I do like to have a little fun, maybe I'll end up changing gears to 4.10 but I'm hoping for decent performance from what I have now. ) Please give me your thoughts. Do I need to get a PCM programer ?? Which one and what settings make sense, also do or should I be using Tow/Haul ?? I think the owners manual says it's only needed with heavier loads. Thanks for your feedback.