Chevrolet Repair: 2004 yukon xl, 2004 yukon xl, yukon xl

Question
heated seat works for 30seconds then shuts off...thereafter they'll run for about 2 sec when I try again. happens with both driver and passenger seats.

Answer
If you email me at waynehowie@rogers.com in the morning I will send you the wiring diagram.  you will not be able to see it via allexperts as the resolution gets screwed up when I upload scanned images.  The wiring diagram will show you where to check.

Wayne