Hollandgmc

I have an 05 Sierra 1500 SLE. I purchased the truck at 170k miles. Seat heaters and power seats worked great for the first few months I had it. Now I have no seat heaters working in either driver or passenger side seats. Driver seat is also dead and doesn't move but passenger seat has power yet. I also checked my fuses and looked for loose wires and all seem to be good. Reading these gives me more things to try before i take it in for professional servicing.