Where is the fan motor on a 2003 Pontiac Bonneville?

The blower motor for the HVAC system in a 2003 Pontiac Bonneville is located behind the glove box (dashboard). To access it, you'll typically need to remove the glove box itself. There are several tutorials available online showing the process, which often involves removing screws and possibly some clips. It's a fairly common repair, so searching YouTube for "2003 Pontiac Bonneville blower motor replacement" will likely yield helpful videos.