Durb wrote:
My son has a Laramie Ram with the Ecodiesel. His payload is around 1,100 pounds. Have them watch the numbers closely. He has commented he wouldn't pull a travel trailer with the truck even though he likes the vehicle a lot.
This is the more likely problem. With 1,100lb payload, I can pretty much guarantee he's over his weight limits even if being careful or worse, well below 10% hitch weight.
1/2 ton truck payloads run between 950-2500lb. A 7000lb trailer should have a hitch weight up around 800-1000lb which counts against payload. Payload also include people and gear in the truck.
The OP needs to provide more info than "diesel 1/2ton" to get a good answer.
Get the specific year, make/model, cab type and even better the stickers on the door jam and we can provide better guidance.
PS: The old "truck brakes stop truck/trailer brakes stop trailer" is great in theory but see how fast you can get the truck by itself from 65 to 0 and then repeat with the trailer...in real life, the truck helps stop the trailer even with properly set up trailer brakes.