Standard Ignition RY-546 HVAC Blower Motor Relay

HVAC Blower Motor Relay for GM SUVs

Standard Ignition RY-546 is an HVAC blower motor relay built for 12-volt systems and direct-fit service on select Chevrolet, GMC, and Cadillac applications. It uses a rectangular 3-connector layout with 7 blade terminals and includes a mounting bracket for proper placement in the vehicle.

Compatible With 2000-2007 Chevrolet Suburban, Tahoe, Avalanche, Blazer; 2000-2007 GMC Yukon, Yukon XL, Jimmy; and 2000-2006 Cadillac Escalade models with the listed blower/resistor configurations. Standard Ignition RY-546 is a practical replacement when the blower circuit needs reliable relay control.

Key Features

• HVAC blower motor relay for 12-volt vehicle electrical systems
• Rectangular housing with 3 connectors and 7 blade terminals
• Male and female connector and terminal design for OE-style fitment
• Mounting bracket included for secure installation
• Composite housing helps protect the relay in harsh underhood temperatures
• Brass or copper contacts are used where specified for wear resistance
• Manufactured under TS16949 and ISO9001 quality systems

Detailed Description

Standard Ignition RY-546 is engineered for blower motor circuit control in select GM trucks and SUVs, including Chevrolet Suburban, Tahoe, Avalanche, and Blazer; GMC Yukon, Yukon XL, and Jimmy; and Cadillac Escalade variants listed in the fitment data. This relay is used in HVAC systems that rely on a blower relay and, on certain vehicles, auxiliary blower or resistor-related configurations. The part number RY-546 is also referenced by cross numbers such as Baldwin 20013 and Monroe Shocks & Struts 1R1381 for the same application.

Built with a composite housing and quality-controlled manufacturing, this relay is intended to handle demanding underhood conditions while maintaining consistent electrical operation. Standard Ignition RY-546 supports service work where the blower motor relay is the source of HVAC fan-speed or blower circuit problems.

What It Helps Fix

• Inoperative HVAC blower motor operation
• Intermittent blower fan function
• Blower circuit relay failure
• HVAC fan speed loss tied to relay control
• Electrical issues in auxiliary blower or resistor-equipped systems

Installation Notes and Tips

Verify the connector shape, terminal count, and vehicle configuration before installation. This relay uses a 12-volt, blade-terminal design with male and female connector interfaces, so matching the original layout is important for proper fit. Confirm whether the vehicle is equipped with an auxiliary blower, resistor, or auxiliary fan control as listed in the fitment notes for Chevrolet Suburban, Tahoe, GMC Yukon, and related applications.

Quality Assurance

Standard Ignition manufactures this relay under TS16949 and ISO9001 certified processes, with quality control maintained from component selection through finished product. Composite housing construction and specified metal contacts support consistent performance in demanding automotive HVAC service.