Power seat not working?

Check fuses. Check under the seat to make sure the power supply is attached and getting power.

It sounds like you need to replace the seat control module which go out here are the instructions on how to so so in the diagrams below.

MEMORY SEAT CALIBRATION PROCEDURE

The memory seat module uses position sensor inputs to establish soft stop locations for the adjuster motors several millimeters ahead of the physical limits of the adjuster assembly. After replacing a memory seat module or adjuster components, it may be necessary to reset the adjuster motor soft stop locations. When the repair procedure has been completed, operate the seat adjuster switch in every direction until the seat adjuster reaches its mechanical hard stop by repeatedly pressing and releasing the switch as necessary.

Check out the diagrams (Below). This fixed my Tahoe.

For an inoperative driver side power seat and seat heater check the wiring harness under the drivers seat. Look for the harness running parallel to the seat track towards the outside of the car. Grab the harness and starts wiggling it while playing with the seat switches. If not that it could be the module or the switch which you would need to have scanned for module problem.

Hello,

Look for worn washers or bushing at the hinge sections and general wear. The main cross bar could be bent preventing full operation. Check out this diagram for your rear seat, at the link below.
Tom

I think what happened is the motor is now bound up as one side moved and the other did not. These are meant to move in unison so when they don't they will bind.

I am hoping this is all it is and the motor is not damaged but we need to remove the seat track screws that hold the track to the floor and then try and move the seat. Be careful when you do this as the tracks are going to move and not the seat as they are no longer anchored but this is what we want to try and get them even again. So you want to move them all the way forward or backward so they are in the same position and then bolt the seat back down.

I attached the process for removing the access covers to get to the bolts.

Let me know what questions you have. Thanks