karlde

On my 2006 Silverado, there was a wire that had to be connected to the under-hood fuse box before I could run lights in a covered trailer. I had already plugged in a Reese trailer brake and it worked fine. I took it to the dealership and told them what was happening and they told me about the wire and hooked it up in no time and didn't charge me. When I bought my 2012, we went back to the service department and I ask him about hooking up that wire. He said it wasn't necessary with the new models.

Using the DIC in my Sierra and using Instant MPG on my daily drive up I-71 for about 30 minutes I have found driving 70-73 MPH, I get 18 to 13 MPG depending on wind and the grade of the road. Going up hill it get less than on flat land or going down hill. A strong head wind or side wind will decrease overall mileage usually below 15 MPG. I don't know how scientific this is or how is compares to your algorithm but it make sense to me. Karl

My new 2011 5.3L with 3.42 rear gets 13.5 mpg at best. Pulling a trailer, it will go down to 9. My wife's 2008 Yukon Denali with 6.2L and 3.42 rear gets 17-19 and we usually have it loaded with our son, his wife and 2 kids. My next Silverado will be a 6.2L and hopefully sooner rather than later. I enjoyed reading all your comments. You sold me! Karl

Wilmington, Ohio here.....Half way between Cincinnati and Columbus on 71. Karl