2001 gmc electric seats not working - GMC Cars & Trucks

First, find the fuse and/or the relay that controls the circuit, and verify the fuse and/or the relay is good.
Although you may find it nearly impossible to do, unhook the wire to the seat motor at the coupling underneath the seat.
It may be underneath the carpet.
Test the wire plug, with the ignition key on and the seat electric seat position lever/button pushed, and see if there is electricity to the seat.
If so, you may need a new motor.
If not, test the switch to see if electricity is getting to the switch.
If so, you may need a switch.
If not, a GMC or a Chevrolet dealer may be in your future.
God bless your efforts.

Could be a bad switch or motor, or something jamming the seat movement.
Can you hear the motor running on both switches and directions?
I don't think they would have two fuses for the seat, but that might be a possibility.
Hope this helps.

reconnect and the connect back the cabel joint under ther the driver seat

Check the fuse , the seat heater is on a seperate fuse due to the amount of amps they draw.

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Check Fuses, also could be a problem with BCM ( Body control module)

i have came across this on one of these before and it was the element that heats the seat had broken ,and ive had one where it was an electrical problem (switch )

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

See GM TSB 05-08-143-001, If you have Adjustable pedals, especially if they don't work with the memeory buttons, but function with thier own buttons. Its the Brake Pedal Position Sensor is shorted and mesing up the seat module which controls the heaters too. My 05 Suburban had the same issue

Use a hammer and tap each of the travel rails on seat, this worked great for me, something just gets misaligned in there.