Power seats and seat heaters right windows not working 2006 gmc

check and test bcm which is located under drivers side rear seat fold it up and unit and harnesses are mounted on floor sometimes get damaged or corrosion--------- https://www.trailvoy.com/threads/unknown-driver-gauges-crazy-etc.100835/ -------------https://www.trailvoy.com/threads/not-solved-unknown-driver-no-p-lock-p-wind-radio-etc.143065/--------https://www.trailvoy.com/threads/not-solved-unknown-driver-no-p-lock-p-wind-radio-etc.143065/ --------file:///C:/Users/john/Downloads/Service%20Bulletin%201551460%20(3).pdf

They wouldnt have a common fuse, so I'd look for a bad ground. Search online for a wiring diagram that shows ground locations.

This may or may not be the problem , so watch some other heated seat repair videos How to Fix Broken not working seat Heater 2003 10 Cadillac CTS CHEVY GMC SEAT HEATER TROUBLESHOOTING YouTube

It's probably not the fuse but instead the heating element in the seat ! There go bad all the time . CHEVY GMC SEAT HEATER TROUBLESHOOTING

CHEVY GMC SEAT HEATER TROUBLESHOOTING

There should be a notation in a Service Manual. If I were trying to troubleshoot this, I would unplug the connector to the seat heater. Then test for power.

But I would think that the seat heater would either measure the temperature achieved and then cut off or have a straight timer and then shut off.

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

There are 2 fuse boxes..

first one is under the hood on the driver side (black cover )

second one is under the driver's side second row seat (tilt the seat forward and you'll find it (black cover)

Try this remove the ckt breaker for the power seats the ckt breaker is located in the fuse box inside down by the drivers left foot. leave breaker out for about 10 seconds then reinstall it and see if the seat starts moving. If it does there is a reprogram for this and needs to be done by a dealer or someone who has access to be able to reprogram your vech.
several things could cause your heated seats to not work. If the seat and heated seat seat stopped at the same time could be the reprogram could fix it. If the heated seat quit working at a differant time it could be the seat heater element. get a schematic of the heated seat and ohm the wires for the element. If either element tests open then the element will need to be replaced. You might as well replace both of them at the same time since the seat covers have to come off to replace the seat heaters.(back and bottom ) If one element is bad then both heaters quit working.

The heating element in the seat may be failing, even thogh it heats the seat, the element could be causing the circut to spike upon power shut down. Relay takes mili-second to shut down after ignition kill and power feed comes direct from battery. Check amp. draw at switch of bad seat and good seat upon shut down. If bad seat higher that 5 amp difference element n/g. Also check for bad relay as they can short internal and cause problems if primary power cut before switch shut down.