Standard Ignition RU-799 HVAC Blower Motor Resistor - Front or Rear

Rear HVAC Blower Motor Resistor for GM Applications

Standard Ignition RU-799 is an electronic HVAC blower motor resistor used to control rear blower speeds in select Cadillac, Chevrolet, Buick, and GMC vehicles. It is built with a plastic and metal housing, a rectangular 2-cavity female connector, and 5 male blade terminals for direct electrical connection.

Fits 2017-2025 Cadillac Escalade, rear; Fits 2017-2025 Cadillac Escalade ESV, rear; Fits 2020-2025 Cadillac XT6, rear; Fits 2017-2025 Chevrolet Tahoe, rear; Fits 2017-2025 GMC Yukon, rear; Fits 2017-2025 GMC Yukon XL, rear; Fits 2022-2024 GMC Hummer EV Pickup, rear; Fits 2018-2023 Chevrolet Traverse, rear; Fits 2018-2023 GMC Acadia, rear; Fits 2018-2022 Buick Enclave, rear; Fits 2013-2022 Buick Encore, N/A; Fits 2016-2019 Buick Cascada, N/A; Fits 2018-2019 Chevrolet Suburban 3500 HD, rear; Fits 2015-2017 Buick LaCrosse, N/A; Fits 2011-2017 Buick Regal, N/A; Fits 2016-2017 Buick Verano, N/A; Fits 2017 Cadillac XT5, front; Fits 2014-2017 Chevrolet Caprice, N/A; Fits 2014-2017 Chevrolet SS, N/A; Fits 2017 GMC Acadia, N/A, rear aux. unit; Fits 2017 GMC Acadia Limited, N/A, rear aux. unit; Fits 2010-2016 Cadillac SRX, front; Fits 2016 Chevrolet Malibu Limited, N/A; Fits 2013-2015 Buick Verano, N/A, module; Fits 2015 Chevrolet Malibu, N/A, automatic temperature control is needed for proper installation; Fits 2014 Chevrolet Malibu, N/A; Fits 2011 Chevrolet Cruze, N/A, module; Fits 2009-2011 Saab 9-5, front; Fits 2010 Buick Allure, N/A; Fits 2010 Buick LaCrosse, N/A, ensure proper fitment and exhaust stock for Manual Transmission Output Shaft Speed Sensor, reorder as needed.

• Electronic coil type for controlled blower speed operation
• 3-5 speed application coverage depending on vehicle configuration
• Black and gray housing with screw attachment method
• Rectangular female connector with 2 cavities and 5 blade terminals
• Direct replacement for rear, front, and auxiliary HVAC locations listed in fitment

Detailed Product Information

Standard Ignition RU-799 is an HVAC blower motor resistor for vehicles that use electronic blower speed control rather than a simple fixed resistor layout. It is used across a wide range of GM platforms, including rear HVAC systems in the Cadillac Escalade, Chevrolet Tahoe, GMC Yukon, and Buick Enclave, as well as select front and module-style applications in vehicles such as the Cadillac SRX, Chevrolet Cruze, and Buick Regal. This part number, RU-799, also cross-references Standard Ignition RU-799 for the same application.

The unit’s plastic and metal construction, screw-on attachment, and blade-terminal electrical interface support a clean replacement on the specified vehicles. Because fitment varies by model, year, and HVAC configuration, confirm the listed position and notes before installation.

Common Problems This Part Can Address

• Blower motor only works on certain speed settings
• Rear HVAC fan speed is inconsistent or inoperative
• HVAC blower stops responding to speed changes
• Intermittent cabin airflow from the front or rear system
• Electrical resistance failure in the blower control circuit

Installation Notes and Tips

Install RU-799 only in the position and configuration shown in the fitment data. Some applications require automatic temperature control or a specific HVAC module setup, and certain listings include rear auxiliary unit or module notes. Inspect the connector, terminal condition, and mounting points before installation, and verify the vehicle’s HVAC system matches the listed application. The part attaches with screws and does not include a wiring harness.

Quality Assurance

Standard Ignition supplies OE-style electrical components for service replacement use. RU-799 is built to match the listed connector style, terminal layout, and application-specific HVAC requirements for the vehicles shown above.