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Dorman 973-578 HVAC Blower Motor Resistor Kit
| Brand | Dorman 973-578 |
|---|---|
| Connector Gender | Female |
| Connector Quantity | 1 |
| Gasket or Seal Included | Yes |
| Mounting Hardware Included | No |
| Mounting Hole Quantity | 3 |
| Package Contents | 1 Blower Motor Resistor; 1 Wire Harness |
| Terminal Gender | Male Female |
| Terminal Quantity | 6 |
| Terminal Type | Blade |
| Wire Quantity | 4 |
| Wiring Harness Included | Yes |
| Wiring Harness Length | 18.5 |
| Fits | Buick · 6 vehicles |
Resistor kit. Includes a resistor and harness pigtail for a complete electrical repair.
Direct replacement. Replaces an overheated or corroded original equipment resistor.
Harness included. Comes with a wire harness, gasket or seal, and blade terminals.
Cross-references Standard Ignition RU-350, 3A1037 and 10446577 for the same application. See all 5.
Dorman 973-578 HVAC Blower Motor Resistor Kit
Dorman 973-578 is an HVAC blower motor resistor kit for vehicles with automatic air conditioning. It replaces an overheated or corroded original resistor and restores blower speed control through a direct-fit resistor and harness pigtail design.
- Includes a blower motor resistor and wire harness pigtail
- Built for HVAC electrical connector repair on the blower motor resistor circuit
- 18.5-inch wiring harness length for service replacement
- Blade terminal design with 4-wire harness and 6 terminals
- Female connector with male/female terminal configuration
- Includes gasket or seal for the repair connection
- 3 mounting holes and 1 connector for OE-style installation
Vehicle Fitment
Compatible With 2002-2007 Buick Rendezvous, N/A, Automatic Air Conditioning (w/AC).
This part cross-references Standard Ignition RU-350 for the same application.
How It Works
This HVAC blower motor resistor kit is used to restore proper blower fan operation when the original resistor has failed from heat damage, corrosion, or connector wear. On Buick Rendezvous models with automatic air conditioning, a worn resistor can cause loss of one or more fan speeds, intermittent blower output, or no cabin airflow at all. Dorman 973-578 provides the resistor and harness needed to address the electrical connection at the source.
Common Problems It Can Solve
- Blower motor works only on certain speeds
- No cabin fan operation at selected settings
- Intermittent HVAC blower performance
- Heat-damaged or corroded resistor connector
- Electrical resistance issues at the blower motor resistor circuit
Installation Notes
Inspect the blower motor connector, resistor mounting area, and surrounding wiring before installation. Replace any heat-damaged terminals or melted insulation found in the harness path. Verify the vehicle uses automatic air conditioning and confirm connector style, mounting hole count, and terminal layout against the original part before service.
Quality Assurance
Dorman supplies this kit as a service replacement for the original HVAC blower motor resistor assembly and connector repair point. It is engineered to address common failure points found in the resistor and harness connection on the listed Buick Rendezvous applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2007 | Buick | Rendezvous | N/A | Automatic Air Conditioning (w/AC) |
| 2006 | Buick | Rendezvous | N/A | Automatic Air Conditioning (w/AC) |
| 2005 | Buick | Rendezvous | N/A | Automatic Air Conditioning (w/AC) |
| 2004 | Buick | Rendezvous | N/A | Automatic Air Conditioning (w/AC) |
| 2003 | Buick | Rendezvous | N/A | Automatic Air Conditioning (w/AC) |
| 2002 | Buick | Rendezvous | N/A | Automatic Air Conditioning (w/AC) |
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