Where is the blower motor located

The blower motor is under the dash toward the passenger side. Here is a link that shows in general how one is replaced:

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

Here are the directions specific to your vehicle for replacement. The attached pics correlate with the directions. In pic 1, I highlighted the blower motor.

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2001 Buick Regal V6-3.8L VIN K
Blower Motor and Fan Replacement

REMOVAL PROCEDURE

pic 2

1. Remove the right side instrument panel insulator.
2. Release the instrument panel harness retainer and position the harness aside.
3. Disconnect the blower motor electrical connector.

pic 3

4. Disconnect the blower motor cooling hose.
5. Remove the blower motor mounting screws.
6. Remove the blower motor.

INSTALLATION PROCEDURE

pic 4

1. Install the blower motor.

NOTE: Refer to Fastener Notice in Service Precautions.

2. Install the blower motor screws.

Tighten
Tighten the blower motor screws to 1.3 N.m (12 lb in).

3. Connect the blower motor cooling hose.

pic 5

4. Connect the blower motor electrical connector.
5. Install the instrument panel harness into the harness retainer.
6. Install the right side instrument panel insulator.

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Let me know if this is what you needed or if you have other questions.

Take care,
Joe