Wow thats a nice Burban!
Your problem is
definatly the fuel pedal. Its electronic and IIRC from the dealer there around $300. I had to get a used one for my 6.5. All you gotta do is remove 3 10mm bolts and unplug the old one then reinstall. The STS light will come on then the truck wont go like its not getting fuel. It will start getting worse as time goes on.
