The 03 blower motor resistor is on a VIN specific recall. Go to your nearest GM dealership and they will run your VIN and see if yours is part of the recall.
For those of you that have already had the repair done AND you have your receipts, you can get a refund. My dad had his '03 repaired about a year ago and at the dealership it cost about $500 for him to get it done. He got a full refund from Chevrolet. This recall is only specific to the 2003 model with the manual temperature adjustment, not the digital one.