2004 GMC Yukon driver side power seat & both heated seats don't work?

this is a copy of your owners manual fuses start on page 565
The instrument panel fuse block access door is
located on the driver's side edge of the instrument
panel. https://www.manualslib.com/manual/1029265/Gmc-Yukon-2007.html?page=1#manual

I have the same problem except the back of mine works but the bottom doesn't. Passenger side is fine. Let me know what you find out if you could.

YOU HAVE SHORT IN THE POWER SEAT SWITCH.YOU DONT WONT TO DISCONNECT WIRES TO SEAT POWER SEAT MOTOR BECAUSE YOUR SIDE IMPACT AIRBAGS ARE CONNECTED TO POWER SEAT CIRCUIT.DONT MESS WITH POWER SEAT YOU CAN SET OFF AIRBAGS,LET DEALERSHIP CHECK IT OUT TO BE ON THE SAFE SIDE.

i have same issue here 2003 yukon

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

checkl fusers and cables to that
the problem is 100% with power

hello, have someone check all fuses-and plugs for the power seat, they may be a relay for this problem, can call autoparts store and ask about any relays for the heated seats and the power seat, if thats not it you may have to replace, electric motor for seat, sounds like a fuse, the way it all quit working..

Check the fuses, the owners manual should be able to help you there.

The controller could be bad but I would probe the related wiring first. From your symptoms it sounds like something can not handle the electrical load. You turn the F/R seat heater on but then you turn on the F/L and the whole system fails. It does sound like the source of the problem will be under the drivers seat. Testing needs to be performed to confirm and identify the source. Both seats share the same fuse and ground. This circuit may have a damaged wire or connector somewhere. Inspect and test as much as you can. Also look underneath the seats for anything. Customers are not aware that personal belongings and trash get pushed underneath the seats and will damage wiring. Also excessively moving the seat forward and back will weaken the harness over time. Please write back and let me know what you need. If it is more diagnostic information or suggestions just let me know. Good Luck

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