Power and Ground
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Battery positive voltage is supplied at all times to both front heated seat relays from the HTD SEAT fuses located in the instrument panel (I/P) fuse block. Both heated seat relay coils are grounded through ground G301.