Ok, but most times they only consider that when Road/Bridge limits may be overshot, very unlikely with just a Burb n TT. Go to Chevy CS or other resource with your VIN, and get an accurate GTW for your ride. I have basically the same ride as you have, and my GTW is 8100. I do have the Towing Pkg and am OTR, that may make some difference. Just the basic Burb should do 7K behind it.