Four Seasons 37280 HVAC Blend Door Actuator Connector

Four Seasons 37280 Harness Connector

The Four Seasons 37280 harness connector is a rectangular HVAC electrical connector built for blend door actuator and related climate control repairs. It features a male connector body with a 6-pin female terminal layout and a 12-inch wiring harness length for service on a wide range of GM, Ford, Lincoln, Mercury, and Saturn applications.

Use this Four Seasons harness connector when repairing damaged HVAC wiring at the actuator connection point. The 37280 part number is commonly searched for HVAC blend door actuator connector replacement on Chevrolet Express, GMC Savana, and other climate control service applications.

Key Features

• Brand: Four Seasons Harness Connector
• Part number: 37280
• HVAC blend door actuator connector / harness connector
• Rectangular connector shape for a secure electrical interface
• Male connector body with 6 female terminals
• Pin terminal type with 6 terminal positions
• 12-inch wiring harness length
• Cross-reference example: Hygrade Tuneup 1575

Product Details

Four Seasons 37280 is an HVAC electrical connector used in blend door actuator, mode door actuator, and recirculation door actuator circuits across many late-model and earlier GM truck, van, and SUV platforms. It is listed for applications such as Chevrolet Express 2500 and 3500, GMC Savana 2500 and 3500, Chevrolet Silverado, GMC Sierra, Cadillac Escalade, Buick Enclave, GMC Acadia, and Ford Fusion, depending on the vehicle’s HVAC configuration. This connector is a practical replacement when the original actuator plug is heat-damaged, broken, loose, or no longer making reliable contact.

What It Helps Fix

• Intermittent HVAC mode or blend door operation caused by a poor connector connection
• Broken, melted, or brittle actuator wiring plugs
• Recirculation door actuator electrical faults at the connector
• Mode door actuator connector damage on Chevrolet, GMC, and Cadillac HVAC systems
• Climate control issues tied to worn terminal contact at the harness end

Installation Notes

Verify the connector shape, terminal count, and vehicle-specific HVAC configuration before installation. Confirm whether the application uses mode door, recirculation door, or blend door actuator wiring, since fitment varies by trim and climate control setup. Compare the existing connector to the 6-terminal rectangular design and inspect the harness for heat damage or corrosion before splicing or replacement.

Quality Assurance

Four Seasons is a recognized aftermarket brand for HVAC service parts and electrical connectors. Part number 37280 is cataloged for direct-fit style HVAC connector service across the listed vehicle applications, with interchange references including Hygrade Tuneup 1575 and OE-style cross references such as 1P2207 and 645541.