[gmtech1]

There is a 30amp circut breaker in the I/P relay block (under the dash, left of the steering column, near the floorboard). That breaker is for the memory seat module, which also controls the heater function. The fuse is in the underhood fuse box, labled MBEC, 50amp fuse. If you pull that you will also lose operation of the r/f door accessories as it supplies power to the r/f door breaker also.