Just for grins, I ran some numbers because I had a feeling that 1000lbs overweight was a bit conservative.
From the Toyota website, I chose the middle of the line SR5 Access Cab w/ a V8, 2WD.
Gross Vehicle Weight Rating of truck 6300
Curb weight 4510
Available payload 1790
Now, let be realistic. The 4510 curb weight is more than likely more because the manufacturers’ rating doesn’t include many popular options such as 4wd. I would guess that your truck weighs in at around 5000lbs. Now, do the math, your payload drops from an estimated 1790 to 1300lbs and you haven’t even got in the seat. So, subtract another 200lbs or so for yourself and other miscellaneous items. So what you’re really left with is about 1000lbs of payload, not bad, but we haven’t hooked up the trailer yet. Subtract another 800lbs for the tongue weight (and it should be about 10-15% of trailer weight for many reasons) and you still have 200lbs of payload left. Oh wait, we need a tank of fuel, another 200lbs. Suddenly we have nothing left of our 6300lb GVWR.
That might not seem too bad until we look at Gross Combined Weight. Toyota rates it at 11,800lbs. So add the 6300lb truck and the 8000lb trailer and you’re looking at a estimate of 14,300lbs, a whopping 2500lbs over weight.
GCWR is where most ½ trucks fall short. There just isn’t enough available payload to play with. Just for comparison, my ¾ ton Duramax has about 2700lbs of payload, and even after loading the wife and kids, and the pin weight of our 5th wheel, I’ve still got about 800lbs of payload left and well under the GCWR.