There may be some help in looking at this slide in the parts drawings.
First is a look at the "gear?" strip that moves it. That does tell us that it is a motor driving a gear in that track. I'm sure it has a name but not one I know! Big point is that it is not a hydraulic type movement.

I think there will be a motor hidden in the corner of the slide as I marked in red. I don't know if it is above or below the gear track but there may be a strip of trim at that corner which can be removed to get to the motor if needed. That part is really vague in my mind, so would need some looking for location.
On my RV, there was a rubber seal/flap that could be pulled to the side to expose the motor????
Reading tells me this can be a problem in the motor itself OR it can be an operator problem! I'm always open to me being the problem if it avoid having to fix some part!
This motor system is designed with a bit of slop or looseness in the gears as two motors never actually run at the same speed! They recomend actually holding the switch to a bit after the slide stops moving whether in or out. That allows the slower motor to catch up fully as the gear is built somewhat loose. This is not something that bothers the motor and is designed to keep them in "sycn"!
Operator error would be a good thing!

But there seems to be a builtin problem and it can needed a real fix.
It may be a motor problem OR it may be a wiring problem. The control wires hang down and seem to need more support or attachment?
If you think of a set of wires running down the corner as I marked in blue, those wires hang down and as we hit bumps, etc., it tends to jerk on those wires! At some point they can creat a problem at the motor or at a plug where the motor harness is plugged to the wiring harness.
A third problem is that water can get in and corrode the connections at the motor!
A controller box like on the under side of the slide where the wires plug, maybe worth a check?
Search for motor replacement or problems may turn up tons of videos as a source of more indepth info?
Hope for the best but assume the worst?
Correction or added confusion? I see a different set of motro and track on the front slide and it is on the body, instead of the slide corner. There appears to be several different motor options, depending on exact build date of the RV, so I may have posted the wrong date. Be aware the motor may be near body or near outside but this is a better picture of what it may look like. This is from the front slide but may change with different build dates!
