Back of seat adjustment

pull the seat adjuster lever and gently tap the runner with a small hammer so it move into position .simple

Look under the front edge of each seat...there is an adjustment bar to move forward and backward...and there is a similiar release lever that when tilted properly each seat is removable...snapping back into place after removal can be trickier. Hope this helps:)

To manually maneuver a power seat because the automatic feature malfunctions, carry out the following steps:
1. Turn of the engine, remove the batteries for safety reasons
2. Ensure that you have the following tools at hand-winder, screwdriver, pliers, knife, gloves, bolt cutters, and safety glasses.
3. Remove the entire rear seat
4. Cut the spring mesh below the seat with the bolt cutters-this will expose the shafts
5. Turn the shaft left to move the seat forward, and turn it right if you want to move it backward - keep turning until you get the desired position
6. Now test if the seat is in the correct position and put everything back in place
One of the many motors in your seat is not working properly, so it may need to be replaced. The problem may also be caused by faulty wiring or a blown-up fuse.

You don't mention what year your Yukon is ? This could very well be a control Module problem .
I'll post how the power memory seat's work or are suppose to work !

Memory Seats Description and Operation

Battery voltage is supplied to the memory seat module through a 25 A circuit breaker. The memory seat module supplies the seat adjuster switch assembly with a battery positive reference voltage. While the seat adjuster switches are in an inactive state the switch contacts are closed to the adjuster switch common circuit. When a seat adjuster switch is pressed to an active state the switch contact is closed to the reference voltage circuit. Battery voltage on a switch signal circuit indicates to the memory seat module the switch status is active. Each seat adjuster motor is controlled by the memory seat module through 2 motor control circuits. While the seat adjuster motors are in an inactive state the motor control circuits are closed to ground circuit contacts within the memory seat module. The memory seat module operates the seat adjuster motors by switching one of a motors control circuits to battery voltage. The seat adjuster motors are bidirectional and the direction of adjuster motor rotation is determined by which of the adjuster motor control circuits is switched to battery voltage while the other remains grounded.


Memory Set/Recall Operation
The seat adjuster motors are equipped with internal position sensors. The adjuster motor position sensors are monitored by the memory seat module and are used to determine the seat position when storing or recalling memory settings. The driver seat adjuster motors use potentiometer type position sensors. The position sensors are supplied with a 5 V reference and ground circuits from the memory seat module. The position sensor signal circuits return to an analog input within the memory seat module. During adjuster motor operation the position sensor provides a voltage change proportional to the change in revolution of the adjuster motor shaft. The memory seat module monitors the voltage from the position sensor signal circuits to determine the adjuster motor positions when storing or recalling memory seat position settings.
The memory recall switch assembly on the driver door provides inputs to the driver door lock/window switch. Battery voltage is supplied to the memory recall switch assembly from the driver door lock/window switch. When a RCL 1, RCL 2, or EXIT switch is pressed, the switch contacts close the appropriate switch signal circuit to the battery voltage supply circuit within the memory recall switch assembly. When the driver door lock/window switch receives active switch signals from the memory recall switch assembly, the appropriate commands are sent to the memory seat module using the GMLAN Serial Data circuit. The Body Control Module software version determines the personalization features available.
Memory seat recall operation is allowed only with the transmission selector lever in the PARK position while the ignition is on. The transmission selector lever position data is provided to the memory seat module by a message through the GMLAN Serial Data circuit.

There are somethings listed you are not familiar with , like GMLAN Serial Data circuit ,maybe Body Control Module software etc... GMLAN is a communincation network that the computers on the vehicle uses to share information , transmit commons etc... you can google it to read about it .

There are DTC'S - diagnostic trouble codes that can set in the module in control . Do you know what DTC'S are .

DTC Descriptors
DTC B1825 01: Driver Seat Recline Position Sensor Circuit Short to Battery
DTC B1825 06: Driver Seat Recline Position Sensor Circuit Short to Ground or Open
DTC B1825 5A: Driver Seat Recline Position Sensor Circuit Plausibility Failure
DTC B1850 01: Driver Seat Lumbar Horizontal Position Sensor Circuit Short to Battery
DTC B1850 06: Driver Seat Lumbar Horizontal Position Sensor Circuit Short to Ground or Open
DTC B1850 5A: Driver Seat Lumbar Horizontal Position Sensor Circuit Plausibility Failure
DTC B1860 01: Driver Seat Lumbar Vertical Position Sensor Circuit Short to Battery
DTC B1860 06: Driver Seat Lumbar Vertical Position Sensor Circuit Short to Ground or Open
DTC B1860 5A: Driver Seat Lumbar Vertical Position Sensor Circuit Plausibility Failure
DTC B2355 01: Driver Seat Front Vertical Position Sensor Circuit Short to Battery
DTC B2355 06: Driver Seat Front Vertical Position Sensor Circuit Short to Ground or Open
DTC B2355 5A: Driver Seat Front Vertical Position Sensor Circuit Plausibility Failure
DTC B2365 01: Driver Seat Rear Vertical Position Sensor Circuit Short to Battery
DTC B2365 06: Driver Seat Rear Vertical Position Sensor Circuit Short to Ground or Open
DTC B2365 5A: Driver Seat Rear Vertical Position Sensor Circuit Plausibility Failure
DTC B2375 01: Driver Seat Assembly Horizontal Position Sensor Circuit Short to Battery
DTC B2375 06: Driver Seat Assembly Horizontal Position Sensor Circuit Short to Ground or Open
DTC B2375 5A: Driver Seat Assembly Horizontal Position Sensor Circuit Plausibility Failure

5) Memory Seat Module is under the front of the driver seat , you could look under an see if all the connectors are fully seated.

The best diagnostic step would be to hook up the factory scan tool an see what the computer is seeing as far as inputs from the switch an outputs it's sending . I wouldn't suggest you take the seat apart an try testing electrical inputs etc.... unless you very familiar with automotive electrical systems an circuits .

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.

The manual lever to release the seat is supposed to have a spring on it to return the release lever to the lock position, if the lever does not spring back when you let go of the seat adjustment lever then you know there is a missing, dis-connected, or broken return spring.

If this is the case try putting the seat where you want it to be and make sure that the adjustment lever returns to the lock position, now check to see if the seat will lock in with the adjustment lever in the lock position.

If it does lock in repair or replace the return spring.

Make sure that the adjustment lever is attached to the locking linkage and it does move the locking mechanism.

If it still does not lock into place then there is something wrong with the seat locking mechanism, and some WD-40 sprayed onto the seat rails and track might release a stuck mechanism, and if everything seems to be working alright, and you can see that the locking mechanism in the seat rail is moving in and out of the lock position, then the locking tabs are most likely sheered off and you will need to replace the seat.

Also look under the drivers side seat and compare the lever position and the linkage connections with the passenger side seat, and make sure that it is all operating like the drivers side seat.

dear friend-the section you are talking about is adjustable and either works electrical or manual,if you have a button moving the seat forward and backwards there will be a button for the back rest.if the seat move with a lever there will be a lever for the back rest.

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

get a junkyard seat it is just easy to go that route

hi,seat motor are in maximum length,try to seat,then apply force backward also the switch in backward mode.