2001 Cadillac dts passenger front and rear seats not heating

Check the heater fuse in rear fuse block if okay have the front pass. Heater module checked out

Test the seat heating grids are recieving power also test they each grid for continuity if they show open u will need to replace them this. Test with a multi meter. Seams like this is a big problem for cadie. Call the dealer to see if they have any kind off service bullitin on a repair or recall. Ty for using 2carpros