Have to hand it to GM. Their backwards thinking on distributing the vehicle's electronics made putting in a powered subwoofer easier. Put in underseat all-in-one sub under the drivers side middle row. The power wire to the battery is only 18 inches long. The floor cover panels actually made routing the wires easy too. Also highly recommend Crutchfield's Sound Ordinance powered subwoofers. Just enough base to fill the gap from the small speakers I had to use, has a remote gain control to put up by the driver.