Dunno if it tells ground locations here:
http://www.aleromod.com/forums/showthread.php?t=19347
Body is usually near the kickpanels, behind the plastic piece, usually a couple under the middle/console of the dash, one behind the cluster sometimes.
BCM is under the right side of the dash, right? Do a drop test on the ground wire/s... look for .0X volts from the ground on the connector to the battery neg post (must be plugged in, key on), do the same for the PCM as well.
Few things to try for ya, good luck!