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Q: Why have the memories for driver 1/2 stopped working? Seat heaters stopped too. on 2004 Chevrolet Trailblazer

about once per year the memory recall for seat position, radio settings, HVAC settings, and seat heaters stop working. You can still move the seats with the switches but the auto feature doesn't work. The seat heaters also stop working. Then, about once per year it starts working again. Goes about 6-9 months without working, then starts working again for a couple of months. Any ideas?
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Have the Body Control Module (BCM) scanned for trouble codes. Check fuses for now also!! You never know unless you check them. Have fixed a bunch of elect. problems by FINDING the RIGHT fuse, find it blown and replacing it.
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