Question about 2002 Buick Century

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2002 Buck Century Custom: HVAC/Def blower (interior) made intermittent squealing sounds after we saw some water on front passenger-side floor following a drive-through carwash. Now it has quit. A/C compressor still loads when Air or Def is selected, but no blower. Fuses all good. What is the besr way in, to reach that blower? Thanks.

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  • Buick Master
  • 6,982 Answers

Noise from the blower says that armature bearings were going bad. Water on floor is a separate issue, likely the drain on the firewall is plugged. I believe your blower motor can be removed from the engine side of the firewall...it's on the passenger side.

Posted on Jun 14, 2009

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Posted on Jan 02, 2017

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The passenger side blend door actuator is used on all models equipped with Automatic Zone Control (AZC). This actuator is located on the front of the HVAC housing to the right of the floor panel transmission tunnel and cannot be removed from the passenger compartment without instrument panel or HVAC housing removal.

NOTE: This procedure is for AZC Systems (Passenger side only).

  1. Disconnect and isolate the battery negative cable.
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  6. Unplug the wire harness connector from the blend door actuator.
  7. Remove the 2 screws that secure the blend door actuator to the HVAC housing.
  8. Remove the blend door actuator from the HVAC housing.
INSTALLATION - AZC (Passenger side only)


  1. In stall the blend door actuator on the HVAC housing and tighten the two mounting screws to 2.2 Nm (20 in. lbs.).
  2. Plug in the wire harness connector to the blend door actuator.
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  5. Evacuate the HVAC system.
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  7. Connect and the battery negative cable.
Hope it helps! If you need more, just send me an email at familyguy77351 at yah I wil be glad to finish helping you with more detail.

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