Power and Ground
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. 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 SEATS fuse located in the instrument panel (I/P) fuse panel. Both relays are grounded through the relay ground circuits and G301.