Chevrolet Repair: 04 Silverado 2500HD, silverado 2500hd, datastream

Question
The drivers heated seat turns off after maybe 3-30 sec.  Passenger seat works fine.  Dealer says could be 1 of 2 things but wants to charge $200 just for diagnosis.  Can you help?  Thanks

Answer
Heya,

 Did I not answer this question this morning or are you a different person?
 The seat switch sends a signal to the door module which in turn sends a serial datastream to the BCM. The BCM controls the seat timer module element drivers.  There is a service bulletin released in 2005 for reprogramming (reflashing) of the door module controller for that very problem.  If you email me at waynehowie@rogers.com I will send you the TSB

Wayne