HomeHVAC > Motors, Core, Case and Related ComponentsStandard Ignition RU-56 HVAC Blower Motor Resistor - Front
Part #: RU-56

Standard Ignition RU-56 HVAC Blower Motor Resistor - Front

Front
⚙️ 49 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: GMC and Chevrolet, G3500, P3500, G10, G20, G30, G1500, G2500, and P30
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Reliable HVAC Blower Motor Resistor for Chevrolet and GMC Vehicles

The Standard Ignition RU-56 HVAC blower motor resistor is designed to restore proper blower motor speed control in select Chevrolet and GMC models. Engineered for durability and precise fitment, this resistor ensures consistent HVAC performance for your vehicle's heating and cooling system.

  • Compatible with Chevrolet G10, G20, G30, P30, and GMC P3500 models
  • Supports 3-5 speed blower motor operation
  • Rectangular connector shape with male blade terminals (4 terminals)
  • Attachment method: screw mount for secure installation
  • No wiring harness or mounting brackets included

Product Details and Specifications

The RU-56 blower motor resistor from Standard Ignition features a screw attachment method, allowing for a secure and stable installation in your vehicle's HVAC system. It includes four male blade terminals arranged in a rectangular connector shape, designed to interface directly with your vehicle's existing wiring harness (not included). This resistor supports blower motors with 3 to 5 speed settings, providing reliable control over your heating and cooling fan speeds. The absence of a wiring harness or mounting brackets means this part is intended as a direct replacement for the original resistor in Chevrolet G10, G20, G30, P30, and GMC P3500 models.

Common Applications and Issues Addressed

  • Restores proper blower motor speed control in Chevrolet and GMC vans and trucks
  • Resolves blower motor stuck on one speed or not working at all
  • Fixes intermittent blower motor operation or inconsistent fan speeds
  • Eliminates overheating or burning smell caused by faulty resistor
  • Addresses blower motor resistor failure symptoms in G10, G20, G30, P30, and P3500 HVAC systems

Installation Notes and Tips

Installation of the Standard Ignition RU-56 blower motor resistor requires removal of the old resistor from the HVAC housing, typically secured by screws. Ensure the vehicle's ignition is off and the battery is disconnected before beginning installation. The rectangular connector with male blade terminals should be carefully aligned with the vehicle's wiring harness connector. Since no wiring harness or mounting brackets are included, reuse the original hardware and connectors for proper fitment. Verify blower motor operation after installation to confirm correct function.

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM specifications, ensuring reliable performance and fitment. The RU-56 blower motor resistor undergoes quality control testing to maintain consistent electrical resistance and durability. While specific warranty details may vary, Standard Ignition typically offers a limited warranty covering defects in materials and workmanship. Consult product documentation or your parts provider for exact warranty terms.

BrandStandard Ignition
Part NumberRU-56
Attachment MethodScrew
Connector GenderNo Connector
Connector ShapeRectangular
Hardware IncludedNo
Harness Length - cmNo wire
Harness Length - inchesNo wire
Mounting Bracket(s) IncludedNo
Number Of Speeds3-5 Speed
Terminal GenderMale
Terminal TypeBlade
Wiring Harness IncludedNo

This part fits 49 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1996GMCG3500FrontHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1996GMCP35004.3LV6Frontw/ AC; Main Unit
1996GMCP35005.7LV8Frontw/ AC; Main Unit
1996GMCP35006.5LV8Frontw/ AC; Main Unit
1996GMCP35007.4LV8Frontw/ AC; Main Unit
1995ChevroletG10Front
1995ChevroletG20FrontHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1995ChevroletG30FrontHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1995GMCG1500N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1995GMCG2500N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1995GMCG3500N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1995GMCP35004.3LV6Frontw/ AC; Main Unit
1995GMCP35005.7LV8Frontw/ AC; Main Unit
1995GMCP35006.5LV8Frontw/ AC; Main Unit
1995GMCP35007.4LV8Frontw/ AC; Main Unit
1994ChevroletG10N/A
1994ChevroletG20N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1994ChevroletG30N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1994ChevroletP304.3LV6Frontw/ AC; Main Unit
1994ChevroletP305.7LV8Frontw/ AC; Main Unit
1994ChevroletP306.5LV8Frontw/ AC; Main Unit
1994ChevroletP307.4LV8Frontw/ AC; Main Unit
1994GMCG1500N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1994GMCG2500N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1994GMCG3500N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1994GMCP35004.3LV6Frontw/ AC; Main Unit
1994GMCP35005.7LV8Frontw/ AC; Main Unit
1994GMCP35006.5LV8Frontw/ AC; Main Unit
1994GMCP35007.4LV8Frontw/ AC; Main Unit
1993ChevroletG10N/A
1993ChevroletG20N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1993ChevroletG30N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1993ChevroletP304.3LV6Frontw/ AC; Main Unit
1993ChevroletP305.7LV8Frontw/ AC; Main Unit
1993ChevroletP306.2LV8Frontw/ AC; Main Unit
1993ChevroletP307.4LV8Frontw/ AC; Main Unit
1993GMCG1500N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1993GMCG2500N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1993GMCG3500N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1993GMCP35004.3LV6Frontw/ AC; Main Unit
1993GMCP35005.7LV8Frontw/ AC; Main Unit
1993GMCP35006.2LV8Frontw/ AC; Main Unit
1993GMCP35007.4LV8Frontw/ AC; Main Unit
1992ChevroletG10N/A
1992ChevroletG20N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1992ChevroletG30N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1992GMCG1500N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1992GMCG2500N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator
1992GMCG3500N/AHVAC Blower Motor Resistor Harness with AC - Voltage Regulator

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

15-71997200734P14825247269953-6970797051321973-077BMRB10078BR205BR96MT18033RU905RUC1159

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.