I spent a few days with my Dad who is a wise old salty guy . He is very anal about his cars, he has a 2WD Stock Tahoe and had this same issue, he was under my truck as soon as we arrived 500 miles away and showing me something I thought I'd share. Stock or Lifted you need to check your truck as Chevrolet built it. Brake Cables on mine needed re-routed as they were chewing away at my fuel tank,he bent his bracket, I just re-landed mine in the big loop to get clearance.Normal it rides at the 90* pigtail. Hope this saves someone a headache,made me wonder how thick the tank was.