I just got my first Duramax last week. Needs some work, (Front clip). But anyways I want to lift it 8" but dont know if I will be able to tow a Toybox Fifth Wheel. Do I need to go with a 6"? Post your pics, and info, Thanks Bill
My rv dealer told me when I bought mine the bedrails on my truck shouldn't be taller than 55 inches. Mine (stock 2500HD 4x4) is 53 inches tall. That being said you could try getting your trailer adjusted so it is level,and measure the heght of your king pin and bottom of your overhang to determine the max height of your truck. Also look at your trailer axles if they are bending down, you could unhook the ubolts and turn the axles up giving you more height. That might be enough to get your lift and still pull. Good luck.:ro)
when you tow something that heavy, any lift is too much. I leveled my truck and have 315s, levelling the trailer is still difficult. if you do not tow level, you either have too little or too mcuh weight on the kingpin or trailer axles. lifts are not made for towing.
before you do anything, check with the manufacturer of the lift.
Also, check the weight rating on the wheels and tires.
In your case, you can flip the axles and raise the trailers center of gravity as well, fun towing in the wind.
Cant see the clearance between the bed rails in Devil's pics or how far off level from front to rear, but would not tow like that myself. For starters, the load rating on the tires is 2510 lbs. not sure about the wheels
Check the pictures in my garage you will see my truck with a 6" lift and 5th wheel toy hauler. local trailer fab shop had to add a custom subframe, axle flip, and large 16" E load trailer tires. I tow the trailer off-road for hunting so I need big clearence between the 5th wheel and the bed. I recommend not even trying a 8" (seen it done) lift 6" was hard enough.
Towing with a 6" lift is the limit if your trailer will work with that at all. I wouldnt even think about anything taller with a 5th wheel. The higher you go, the harder it will be to control in all conditions. I towed for years with a 6" lift without a problem but I think its right on the edge.
A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more!