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Googling that vin, looks to be This Truck here. As mentioned, your yellow sticker will get you close to payload. The best method is to weigh the truck and subtract from your GVWR of 7,000
What I was able to gather from the photos/description:
SCrew 145" WB Truck
5.0 & 4x4
Axle code 27 = 3.31 gears
The description states "tow package" - That could be:
If equipped with tow package is 53B (Medium duty tow package) then your tow capacity if 5,000lbs
If equipped with tow package 53A (HD Tow package) then your tow capacity is 8,900lbs. Keep in mind above 5k, you need a weight distribution hitch.