GMC Envoy Air Suspension Sensor

Do not do this. You can crush yourself. This task involved transferring significant weight between interdependent structures. There are a lot of fragile pieces that can break. Pay someone else to do it!
In this video, I am trying to diagnose and adjust the rear air suspension sensors on a 2003 GMC Envoy. The suspension sometimes sags overnight. The service manual gives instructions for doing a procedure similar to this by using a vehicle lift. I am doing this on the garage floor with jacks and commonly available tools.
I began the procedure when the vehicle was at full jounce (compression) after sitting for a while. I put chocks on the front tires. I started the engine and allowed the suspension to fill enough to get the jack under the frame. I took out fuse #1. With the jacks under the frame, I lifted the vehicle to the height of one concrete block, two 1x4s, and a real estate section from the paper. I then lightly loosened the lug nuts while the tires were on the ground. Then I jacked the axle up to get the tires off the ground. I removed the wheels.
A correction to the video is the sensor arm goes up when the axle goes up, and the sensor arm goes down when the axle goes down.
I made more than one video so the order at this point is not absolute,
I took the sensor off and measured it with a multimeter for resistance.. I know this is supposedly an LVDT or RVDT, but it only has two wires, and is plastic (no ground.) Although a resistance check does not prove the sensor faulty or good, it at least tells me that the reading are the same, and that there is not a short or open connection. I also rotated the sensor some to see if the resistance changed, but it did not seem to.
I cut a board to ~5.33 inches and placed it in the gap between the axle tube and the jounce jumper bracket.
KEEP THE DRILL BIT OUT OF THE SENSOR WHILE YOU ARE MESSING WITH THE AXLE.
I then raised the axle while the board was in the gap between the axle tube and the jounce bracket. I put the drill bit in the sensor to align it. I tightened the sensor to the frame.
I am curious to see if this works. There is not a lot of information available on this system other than replacing the compressor. The sensors are a little too expensive to purchase on speculation.
All in all I did not make a very big adjustment. With faith, some WD-40, and dielectric grease, this might work.