[richtazz]

The two back bolts toward the firewall are tough to get to. The bolt holes in the resistor are slotted, so you only have to loosen them slightly to slide the resistor out. Definitley take the blower motor out, as access to the resistor is almost impossible without doing so. Check for moisture in the heater housing. If the cowl seal under the hood has shifted, it will allow water in and that is what shorts out the replacement resistors. If this is the case, you'll need to re-seal the cowl inlet. Also, get a cabin air filter for a like year Buick Regal (Grand Prix's have the spot for them, but GM didn't put one in from the factory AC-Delco part #CF132). The cabin air filter keeps both dust and debris out of the HVAC system, as well as creates a better seal against future water intrusion.