I want to replace the original heat seat inserts. I know they are sewed in and I have a plan for that but my main concern is which ones will fit and work preferably with the factory harness? The dealer only sells them with the seat leather skins since they are sewed in. Has anyone replaced these and which ones worked. I am nervous to just buy a set off amazon and ebay that say they fit because in the past I have received parts that didn't fit at all or they required lots of modification to make work. Thank you.
2003 Hummer H2

 

i am not too sure but what i do know is they have to have 4-6 ohms resistance
anything higher or lower and they will not turn on and stay on or not turn on at all.

 

 

seen this in an old post

 

look up the seat shop heating element like this: