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Thank you DenaliSS! Been looking for the damn installation sheet for 3 days! I've done a lot of brakes but just wasn't sure if there any weird bleed procedures or what I needed to do with the unused electronic sensor. I got my kit from shopchevyparts.com and the box was busted all to pieces and I'm honestly not 100% certain I have all the hardware since it was all just kind of laying out on my porch after delivery. Also, not even certain this is genuine or if it's counterfeit. The only piece of paper in the box looked like it had been photocopied at a high school library in 1994. Guess we gonna send it and find out!

I know this is an old post but since GM offers the 3.0 Duramax with 3.73's and someone like me who has a 6.2 with 3.42's and has gone up to 35's, going to 3.73's would make up for the tire size difference. (weight and wind resistance is a different story) but at least when towing my 10,000lb toy hauler I'd be slightly better off than where I am today. I'd rather go all the way to a 4.10 but with 3.73's my speedo would be extremely close and I could ditch the Hypertech inline corrector. Thoughts?

How do I check for the passive exhaust valve?

I have a Borla cat back exhaust and the AFM/DOD disabled. However it does sound like to me that it's coming from the back half of the truck. But if its a driveline issue somewhere I think those always sound like they are behind me probably just due to the properties of sound dynamics and that I hear it a lot more over 30mph but at steady, low rpm cruising, or when lightly accelerating out of a turn.

My 2014 started doing this about 10,000 miles ago. Identical. I've been searching and the intenet for months and finally found this thread! Did anyone find out what the fix is? Isee the thread about the 8 speed transmission but that issue doesn't seem quite like what us on this thread are experiencing. Man I hope someone responds with "dude your heat shield is just vibrating off the bottom of the cab!" I also, have another odd noise that sounds like a wheel bearing hum but I cannot get any play out of the front wheels and I did change one hub already for another reason. Anyway, any help or incite would be greatly appreciated.

I also out of the blue got a "service front camera" message and all functions associated are disabled. (collision alert, lane assist) I don't want to pay $400 for the camera myself either and what if that's not even the problem. Did anyone find any solutions or things to check before biting the bullet?