How do I replace the cover over the driver's side seat adjuster...the part that moves the seat forward and backward

sounds like you might have a switch problem if the memory for seat position works ok. If you have a multimeter that checks for continuity then you could start there at the switch but you would also need a wiring diagram for the seats

Before you do any of the expensive things disconnect and reconnect the wiring to the seat I had the same exact problem with my 2009 Chevy Impala and was ready to take it to the dealer when I disconnected the power cables to it and reconnected them I found that one of the Harnesses was loose and the problem was solved

You don't idicate whether it's a power or manual seat. Assuming it's a manual seat there is a link between the rails under the seat. It can become disconnected preventing the right rail lock from unlocking.

Hi, follow the instruction below......
Rear
See Figures 3, 4, 5 and 6

1. Remove the lower seat cushion by pulling straight up on the front portion and disengaging the clips. Then hinge the seat upward to release the rear clips.
   

Fig. 3: Pull up on the front of the lower seat cushion and disengage the clips

1. Remove upper rear seat back-to-chassis bolts.

Fig. 4: Remove the bolts behind the center armrest ...



Fig. 5: ... and the bolts on the lower corners ...



Fig. 6: ... Then pull up on the seat to disengage the three clips on the top of the seat

1. Remove rear seat back by tilting forward and pulling straight up.
   

To install:

1. Install the lower seat cushion and torque the lower rear seat-to-chassis bolts to 15-20 ft. lbs. (21-26 Nm).
2. Install the upper rear seat back cushion and torque the upper rear seat back-to-chassis bolts to 15-20 ft. lbs. (21-26 Nm)

Those power seats have two power motors. One moves it up and down. The one that moves the seat forward and backwards must have gone bad. Have it checked and replaced if necessary.

It isn't wired wrong. Mine does the exact same thing, but it didn't used to be backwards and the wiring has never been changed.

Check the fuse box for a blown fuse, both seats may operate on one fuse depending on the model of vehicle and the fuse may be located either under the dash on the drivers side or in the engine compartment on the drivers side.

I have a 2005 Jeep Liberty and the smae lever that tilts the seat also moves it forward and back. Press forward or back on the switch. Also check for blown fuse or a loose wiring connector under the drivers seat. Good luck, Techjoel

is look like a fuse blowen you need to replace it look in the munual book

Good day;
What year is you car? Does the other controls work for the seat? and just to clarify the seat won't go forward of back?


Cheers