Originally Posted by jamaddox
And that should have been what the dealer did when he installed the WDH. The truck pulls my setup perfectly. I was just making an observation that things sometimes look odd.
Keep in mind that while your dealer may have set up the wdh pretty darn close for your tt, all dealers have no knowledge exactly how the customer will load the tt, so adjusting the wdh for a loaded trailer is like playing the lottery. Some hit the jackpot, some can't even break even adjusting for an empty trailer!!! Lol
Here is a link to setting up a wd hitch
As mentioned, hitting the CAT scales is the best, but you can get close by measuring the front end height. Read your owners manual of the GC to see what is recommended for a wdh adjustment. Some vehicles need 100% of the weight lost from the front axle to be restored, some only 25% or 50% (newer vehicles). I would guess your GC needs 100% of the weight restored. This means that the front axle weight of the GC without a trailer hooked up is the same as after you're hooked up once the wdh is adjusted and installed. When you hook the tt up, but before you latch up the wd bars the front axle will have lost weight due to the tt tw (tongue weight) being placed on the ball. Once the wd bars are latched up some or all of the "lost weight" will be restored to the front axle. This depends on how the hitch head is adjusted.
As for the mpg, welcome to the RV Club!!!! Lol With our setup (listed below) we get ~7-9mpg towing here in Mi. Even towing our 12' clamshell snowmobile trailer we only get about 10mpg. And our 2 sleds and trailer weigh maybe 2300lbs....