Front power seat on 2005 gmc denali doesn't raise or lower

Drop out of the sale unless they fix it.

It involve removing the seat and the electrical contacts and seeing what has come adrift on that function.

https://www.google.com/search?q=2007+Hyundai+Santa+Fe+Limited%2C+seat+won%27t+raise

..

No , it's a sealed unit . Hub bearing doesn't cost that much . Wheel bearing assembly replacement 2005 GMC Yukon Denali install remove...

The common cause is the control is defective.

check all your fuses.

You probably interrupted the antitheft system. This link explains.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

So here is a diagram of the seat circuitry for your car. Since every other function works except the forward/backward slide function, that leaves basically the forward/backward slide motor, the seat switch, and/or the wiring. If you can verify that the wiring under the seat is in good condition without obstructions, chaffed wires, and/or wires pulled too tight, then it's safe to say it's down to just the motor and/or the switch. Sometimes if the passengers front seat has the same switch, you can plug it in to the drivers' side connector and see what works and what doesn't. If the seat works fine with the other switch, then that's all it needs, if not then it will need a motor. If the other seat doesn't have a switch then you can find them at wrecking yards, or just supply power and ground to the motor in question to see if it works. If it does, then you know you kneed a switch and if not then a motor.
I hope this info helps!~subyguru~

check the power plug array and see that the terminals are not corroded

There are usually 3 motors for power seats, 1 to tilt the seat, 1 to raise and lower the seat, and 1 to move the seat back and forth. I would think that motor is bad. Check for any obstuctions to the seat track.

Front or back power folding seats? Front power seats have no manual release. Rears may have release, would need to look up, can get back to you.

test to see if you have any power going through all the connectors for the seat heater, there may be a spot where there is a connector that has gone bad, or potentially it could be the whole element that is bad