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1) Order the resistor pack from your local parts store or dealership. Shop around - prices vary quite a bit. Most parts stores will need to order this from their warehouse, so it might take a day or three to get the part. Dealerships will probably have it in stock, but it will cost more. I don't know whether there is any difference in quality from one store to another.

2) The resistor pack is located under/behind the glove box. Remove the plastic fascia under the glove box by removing the two screws (one on each of the box, and just below it.) Also remove the push-in wire harness anchor.

3) Now look under (upward) the glove box. You will see the resistor pack. Remove the two 5.5mm screws and replace with the new resistor pack.

4) Replace the fascia under the glove box.

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Q: How do you replace the blower motor resistor pack on a Trailblazer?
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