You could de-cambered(flattened)The leaf springs, they can be done by anyone with a big press or professionally or buy flat lowering springs.
If your mechanically inclined:
The cheaper way and its pretty strait forward. first the obvious the back end in the air, wheels off, and strait away you will see that the axle is under the leafs, also you will see were the shocks are located, all you need to do is get the axle on top of the leafs, if you did that the shock mount would be on the wrong side and you wouldn't be able to fit it back on, now to do that! take a look at how the axle is held on to the leafs and look how the shocker is mounted to the plate, if you cut the mounts of the plate and re-weld them on the other side(this is cheap welding job) the mount will fit and you just lowered your van EASY, It takes 6hours+ but 3 of them were cleaning. The axle is now on top of the leafs i can now fit lowering blocks which cost peanuts. Also, upgrade shocks for handling.
It can be done, yes.
NO
it has to be out of a van because the Axel housing in a van is longer than any other vehicle Even trucks.
plug on pumpkin on front of rear end on passenger side
On the lower rear end or side of oil pan
no
the most it can tow is 4500-5500 pounds depending on the rear end gears.
very simple there is a plug on the side of the rear end that takes a 3/8 rachet just loosen that plug and remove.
No.
Lower rear of engine
driver side, lower, rear of engine.driver side, lower, rear of engine.
Where is the left rear brake and turn signal relay located on a 2010 Chevy express van. V-6