GM Astro/Safari 1985-1996 Repair Guide

Heater Blower Motor

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REMOVAL & INSTALLATION



Front (Main) Motor

See Figures 1, 2, 3 and 4



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Fig. Fig. 1: The heater blower motor is mounted on the heater case assembly. This is shown without AC, but it is similar with AC



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Fig. Fig. 2: Both the ground connector and the power connector need to be removed from the push on tabs



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Fig. Fig. 3: The blower motor is held on its circumference by screws



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Fig. Fig. 4: Pulling the housing back will expose the fan blade connected to the motor shaft

The blower motor is located in the engine compartment on the right side of the firewall.

  1. Disconnect the negative battery cable from the battery.
  2.  
  3. Disconnect the electrical connectors from the blower motor.
  4.  
  5. Remove the radiator coolant collecting bottle from the right side of the engine compartment.
  6.  
  7. Remove the windshield washer fluid bottle from the right side of the engine compartment.
  8.  
  9. If equipped with an acoustic cover over the motor, cut the cover between the clip lands and save the cover for reassembly.
  10.  
  11. Remove the blower motor-to-duct housing screws and the blower motor from the vehicle.
  12.  
  13. If necessary, replace the blower motor-to-duct housing gasket.
  14.  

To install:
  1. Install the motor and gasket. Torque the retaining screws to 18 inch lbs. (1.6 Nm). Install the acoustic cover, if removed.
  2.  
  3. Install the windshield washer fluid bottle on the right side of the engine compartment.
  4.  
  5. Install the radiator coolant collecting bottle on the right side of the engine compartment.
  6.  
  7. Connect the electrical connectors to the blower motor.
  8.  
  9. Connect the negative battery cable to the battery.
  10.  
  11. Check for proper operation.
  12.  
  13. Refill the windshield washer bottle and the radiator coolant collecting bottle.
  14.  

Rear (Overhead) Motor

See Figure 5



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Fig. Fig. 5: Rear heater assembly

A rear overhead heater provides heating to the rear of the vehicle. It is located on the left side of the vehicle, in front of the wheel fender and is concealed behind a cover.

  1. Disconnect the negative battery cable from the battery.
  2.  
  3. Remove the cover-to-heater unit and the cover.
  4.  
  5. Disconnect the electrical connector from the blower motor.
  6.  
  7. Remove the blower motor-to-heater housing screws and the blower motor.
  8.  
  9. If necessary, replace the blower motor-to-heater housing gasket.
  10.  

To install:
  1. Use a new gasket (if necessary) and install the motor. Torque the retaining screws to 18 inch lbs. (1.6 Nm).
  2.  
  3. Connect the electrical connector to the blower motor.
  4.  
  5. Install the cover-to-heater unit and the cover.
  6.  
  7. Connect the negative battery terminal to the battery and check operation.
  8.  

 
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