WHY IS FRONT SEAT SLIPPING - Silverado 1500 Chevrolet Cars & Trucks

Where the wiper arm goes on the pivot it is a spline with a little clip to hold it on I think the clip let loose and the moved up and the arm slipping on the spline Try pushing it back down

it sounds like the motor is slipping or the gear that drives the seat is stripped

The problem it could be a slipping clutch.

How to Diagnose Slipping Clutch in Your Car

Call an autorecycler and ask them to find you a replacement seat. The doodads which make these car cost more have a short life span. If you want long life, stay with plain jane stuff. You need a new seat motor and a replacement used seat will cost less than a new seat motor and the cost to swap a seat in and out will cost less than the labor to take the seat out repair it and then put it back together.

Would have to be a broken lock mechanism on the bottom of your seat,

spring in female either stuck or broke ,smack to bottom spring may pop back if not look in a salvage yard for replacement[cheapest] ,online or dealer

check the wire underneath the seat and be sure it's not too tight preventing the latching mech on the other side from slipping into the detent.

Most of the time its the little worm gear that went bad not the switch (the gear is slipping on the fixed bracket) I pushed back on the seat real hard and hit the switch and Mine went back finally, the track/motor assembly will have to be replaced(250 from Ford) Very Common problem . ----------------------- to remove the seat  First disconnect the connectors under the seat. Remove the 3 bolts (Front Left, Front Right, Rear Right). Remove the nut from the Left Rear. Lift seat up and out. 

thanks.

Head Restraints Each front seat is equipped with dual-post design front seat back head restraint (611A08). The front seat back head restraint is installed as follows:

• It travels on dual posts which have notches to engage a spring-loaded catch in the guide.
• The front seat back spring assembly retains the front seat head rest guide rod sleeve (610A16).

• The front seat back head restraint is adjustable from its normal position to a raised position of approximately 25 mm (1 inch).
• Pull up on the front seat back head restraint to raise it. Pushing down will return it to its normal position.

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Removal

1. Unscrew front seat head rest guide rod retainers (610A18).
   

1. Pull up on front seat back head restraint (611A08). Compress foam in area of front seat head rest guide rod sleeves (610A16).
   

1. Remove front seat back head restraint positioning springs. Pull front seat back head restraint up and out.
   

Installation

1. Slide front seat head rest guide rod retainers onto front seat back head restraint posts.
   

1. Compress foam in front seat head rest guide rod sleeve area. Install positioning springs on front seat head rest guide rod sleeves.
   

1. Insert front seat back head restraint posts (notches on posts facing rearward) into front seat head rest guide rod sleeves and push down to engage positioning spring.
   

1. Tighten front seat head rest guide rod retainers onto front seat head rest guide rod sleeves.
   

1. NOTE: Front seat back head restraint must operate smoothly throughout its range of travel, must remain in any fixed position, and must not be freely removable from the seat back. If any of these conditions are not met, check for proper installation of positioning spring onto front seat head rest guide rod sleeve.
   
   Adjust front seat back head restraint by applying hand pressure, either up or down, to center area of front seat back head restraint.
   

U will have to replace the entire power seat transmission, there is no other way to get the part, I know it sucks but that is the way it is, try finding a used unit, or swap the passenger side to the drivers side.